view aggregate.py @ 7:8ee385f883e3 draft

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author kaymccoy
date Fri, 12 Aug 2016 16:45:00 -0400
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# A translation of aggregate.pl into python! For analysis of Tn-Seq.
# This script requires BioPython just like calc_fitness.py, so you need it installed along with its dependencies if you want to run these scripts on your own.
# How to install BioPython and a list of its dependencies can be found here: http://biopython.org/DIST/docs/install/Installation.html
# K. McCoy









##### ARGUMENTS #####

def print_usage():
	print "Aggregate.py's usage is as follows:" + "\n\n"
	print "\033[1m" + "Required" + "\033[0m" + "\n"
	print "-o" + "\t\t" + "Output file for aggregated data." + "\n"
	print "\n"
	print "\033[1m" + "Optional" + "\033[0m" + "\n"
	print "-c" + "\t\t" + "Check for missing genes in the data set - provide a reference genome in genbank format. Missing genes will be sent to stdout." + "\n"
	print "-m" + "\t\t" + "Place a mark in an extra column for this set of genes. Provide a file with a list of genes seperated by newlines." + "\n"
	print "-x" + "\t\t" + "Cutoff: Don't include fitness scores with average counts (c1+c2)/2 < x (default: 0)" + "\n"
	print "-b" + "\t\t" + "Blanks: Exclude -b % of blank fitness scores (scores where c2 = 0) (default: 0 = 0%)" + "\n"
	print "-f" + "\t\t" + "An in-between file carrying information on the blank count found from calc_fitness or consol_fitness; one of two ways to pass a blank count to this script" + "\n"
	print "-w" + "\t\t" + "Use weighted algorithm to calculate averages, variance, sd, se" + "\n"
	print "-l" + "\t\t" + "Weight ceiling: maximum value to use as a weight (default: 999,999)" + "\n"
	print "\n"
	print "All remainder arguements will be treated as fitness files (those files created by calc_fitness.py)" + "\n"
	print "\n"
	
import argparse 
parser = argparse.ArgumentParser()
parser.add_argument("-o", action="store", dest="summary")
parser.add_argument("-c", action="store", dest="find_missing")
parser.add_argument("-m", action="store", dest="marked")
parser.add_argument("-x", action="store", dest="cutoff")
parser.add_argument("-b", action="store", dest="blank_pc")
parser.add_argument("-f", action="store", dest="blank_file")
parser.add_argument("-w", action="store", dest="weighted")
parser.add_argument("-l", action="store", dest="weight_ceiling")
parser.add_argument("fitnessfiles", nargs=argparse.REMAINDER)

arguments = parser.parse_args()

if not arguments.summary:
	print "\n" + "You are missing a value for the -o flag. "
	print_usage() 
	quit()

if not arguments.fitnessfiles:
	print "\n" + "You are missing fitness file(s); these should be entered immediately after all the flags. "
	print_usage() 
	quit()
	
# 999,999 is a trivial placeholder number
	
if (not arguments.weight_ceiling):
	arguments.max_weight = 999999
	
# Cutoff exists to discard positions with a low number of counted transcripts, because their fitness may not be as accurate - for the same reasoning that studies with low sample sizes can be innacurate. 
	
if (not arguments.cutoff):
	arguments.cutoff = 0

# Gets information from the txt output file of calc_fit / consol, if inputted

if arguments.blank_file:
	with open(arguments.blank_file) as file:
		blank_pc = file.read().splitlines()
		arguments.blank_pc = float(blank_pc[0].split()[1])

if (not arguments.blank_pc):
	arguments.blank_pc = 0





##### SUBROUTINES #####

# A subroutine that calculates the average, variance, standard deviation (sd), and standard error (se) of a group of scores; for use when aggregating scores by gene later on

import math
def average(scores):
	sum = 0
	num = 0
	for i in scores:
		sum += i
		num += 1
	average = sum/num
	xminusxbars = 0
	for i in scores:
		xminusxbars += (i - average)**2
	variance = xminusxbars/(num-1)
	sd = math.sqrt(variance)
	se = sd / math.sqrt(num)
	return (average, variance, sd, se)

# A subroutine that calculates the weighted average, variance, standard deviation (sd), and standard error (se) of a group of scores; the weights come from the number of reads each insertion location has
# For use when aggregating scores by gene later on, if the weighted argument is called

def weighted_average(scores,weights):
	sum = 0
	weighted_average = 0
	weighted_variance = 0
	top = 0
	bottom = 0
	i = 0
	while i < len(weights):
		if not scores[i]:
			scores[i] = 0.0
		top += float(weights[i])*float(scores[i])
		bottom += float(weights[i])
		i += 1
	if bottom == 0:
		return 0
	weighted_average = top/bottom
	top = 0
	bottom = 0
	i = 0
	while i < len(weights):
		top += float(weights[i]) * (float(scores[i]) - weighted_average)**2
		bottom += float(weights[i])
		i += 1
	weighted_variance = top/bottom
 	weighted_stdev = math.sqrt(weighted_variance)
	weighted_stder = weighted_stdev/math.sqrt(len(scores))
	return (weighted_average, weighted_variance, weighted_stdev, weighted_stder)










##### AGGREGATION / CALCULATIONS #####

#Reads the genes which should be marked in the final aggregate file into an array

import os.path
if arguments.marked:
	with open(arguments.marked) as file:
		marked_set = file.read().splitlines()

#Creates a dictionary of dictionaries to contain a summary of all genes and their fitness values
#The fitness values and weights match up, so that the weight of gene_summary[locus]["w"][2] would be gene_summary[locus]["s"][2]

import csv
gene_summary = {}
for eachfile in arguments.fitnessfiles:
	with open(eachfile) as csvfile:
		lines = csv.reader(csvfile)
		for line in lines:
			locus = line[9]
			w = line[12]
			if w == 'nW':
				continue
			if not w:
				w == 0
			c1 = float(line[2])
			c2 = float(line[3])
			avg = (c1+c2)/2
			if avg < float(arguments.cutoff):
				continue
			if avg > float(arguments.weight_ceiling):
				avg = arguments.weight_ceiling
			if locus not in gene_summary:
				gene_summary[locus] = {"w" : [], "s": []}
			gene_summary[locus]["w"].append(w)
			gene_summary[locus]["s"].append(avg)

#If finding any missing gene loci is requested in the arguments, starts out by loading all the known features from a genbank file

from Bio import SeqIO
if (arguments.find_missing):
	output = [["locus","mean","var","sd","se","gene","Total","Blank","Not Blank","Blank Removed","M\n"]]
	handle = open(arguments.find_missing, "rU")
	for record in SeqIO.parse(handle, "genbank"):
		refname = record.id
		features = record.features
	handle.close()
	
#Goes through the features to find which are genes
	
	for feature in features:
		gene = ""
		if feature.type == "gene":
			locus = "".join(feature.qualifiers["locus_tag"])
			if "gene" in feature.qualifiers:
				gene = "".join(feature.qualifiers["gene"])
		else:
			continue
			
#Goes through the fitness scores of insertions within each gene, and removes whatever % of blank fitness scores were requested along with their corresponding weights

		sum = 0
		num = 0
		avgsum = 0
		blank_ws = 0
		i = 0
		if locus in gene_summary.keys():
			for w in gene_summary[locus]["w"]:
				if float(w) == 0:
					blank_ws += 1
				else:
					sum += float(w)
					num += 1
			count = num + blank_ws		
			removed = 0
			to_remove = int(float(arguments.blank_pc)*count)
			if blank_ws > 0:
				i = 0
				while i < len(gene_summary[locus]["w"]):
					w = gene_summary[locus]["w"][i] 
					if removed == to_remove:
						break
					if float(w) == 0:
						del gene_summary[locus]["w"][i]
						del gene_summary[locus]["s"][i]
						removed += 1
						i -= 1
					i += 1
			
#If all the fitness values within a gene are empty, sets mean/var to 0.10 and Xs out sd/se; marks the gene if that's requested

			if num == 0:	
				if (arguments.marked and locus in marked_set):
					output.append([locus, "0.10", "0.10", "X", "X", gene, count, blank_ws, num, removed, "M", "\n"])
				else:
					output.append([locus, "0.10", "0.10", "X", "X", gene, count, blank_ws, num, removed, "\n"])

#Otherwise calls average() or weighted_average() to find the aggregate w / count / standard deviation / standard error of the insertions within each gene; marks the gene if that's requested

			else:
				if not arguments.weighted:
					(average, variance, stdev, stderr) = average(gene_summary[locus]["w"])
				else:
					(average, variance, stdev, stderr) = weighted_average(gene_summary[locus]["w"],gene_summary[locus]["s"])
				if (arguments.marked and locus in marked_set):
					output.append([locus, average, variance, stdev, stderr, gene, count, blank_ws, num, removed, "M", "\n"])
				else:
					output.append([locus, average, variance, stdev, stderr, gene, count, blank_ws, num, removed, "\n"])
		
#If a gene doesn't have any insertions, sets mean/var to 0.10 and Xs out sd/se, plus leaves count through removed blank because there were no reads.

		else:
			if (arguments.marked and locus in marked_set):
				output.append([locus, "0.10", "0.10", "X", "X", gene, "", "", "", "", "M", "\n"])
			else:
				output.append([locus, "0.10", "0.10", "X", "X", gene, "", "", "", "", "\n"])

#Writes the aggregated fitness file

	with open(arguments.summary, "wb") as csvfile:
		writer = csv.writer(csvfile)
		writer.writerows(output)

#If finding missing genes is not requested, just finds the aggregate w / count / standard deviation / standard error of the insertions within each gene, and writes them to a file, plus marks the genes requested
#This is never called through Galaxy since finding missing genes is just better than not finding them.

else:
	output = [["Locus","W","Count","SD","SE","M\n"]]
	for gene in gene_summary.keys():
		sum = 0
		num = 0
		average = 0
		if "w" not in gene_summary[gene]:
			continue
		for i in gene_summary[gene]["w"]:
			sum += i
			num += 1
		average = sum/num
		xminusxbars = 0
		for i in w:
			xminusxbars += (i-average)**2
		if num > 1:
			sd = math.sqrt(xminusxbars/(num-1))
			se = sd / math.sqrt(num)
		if (arguments.marked and locus in marked_set):
			output.append([gene, average, num, sd, se, "M", "\n"])
		else:
			output.append([gene, average, num, sd, se, "\n"])
	with open(arguments.summary, "wb") as csvfile:
		writer = csv.writer(csvfile)
		writer.writerows(output)
		






























































































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#=~~~::~~::,                                                                                            ~?78MMMDNMM?    :+I$DD87?=,      OMNDO$7$OI:         7N+     ?MNMN~   MMMNM$    7M$    7M$   +NMMO,    ?N~        ~8+   ~7NMMNNOI=         ~?ONZ+             ~ZNND,$M8  ~MO                                                                                       $MMMMMMMMMM7:::~~~~~~=+++===~~~:::,,  
#                                                                                                            ,~ONMMNO~,        :?8NNMN8?~ZNMMMMMMMMMNMMNDOI=~NM?      =MMM+   NMMMO     8M$   ,MM,  $MMMN      =D,      ,?N~     , ?NMMMNNNDDO8DDD887,             ,$ND= :O$NMZ  IMO                                                                                     ,IMMMMN$, 7NO,                 ,,,,,:,,,
#                                                                                                                 ,~IDMNN8OI,       :~+$DMMMMMMMN87+=~~~~?ZDNNMM,      ?NM?   :NMN     :MM7   ~MN ~DMMMN        O~     :DD,         ,MMMMNNOI:,,       ,     ,=ZODD8D?    :MMM:  NMZ                                     +8NM8,                                           ,,       :~                      ,,~:, 
#                                                                                                                         ,INNMMNNO+           :=78NNZIIONMNNDMMN       ,7D~           :MN~    MNMM?=MM          $?   OD,         ,IMD     ,:8MNMNNNNNNNNMMNM7:     :8~  ZND    OMN7,                                 :NNMMMMN                                                                       :8MMMMMNZ=: 
#                                                                                                                              :O88NMMN$=~:,           ?MMN88NMMMD                     =MN?     =,  :NM           +7$NO,          =N8 ,       OMI, ,,     7M:        ZDDND?     MMO         ,,                       +MM8?OMN:                                                                       ,::         
#                                                                                                                                     :$NMMMNMM8I:     ,8MD,   +MMN=            ,=?77=:ZMMM7        ?MN             ~$+          7M7         ,DZ          :M~       IMM8:     ,8MN,               , ,,,,           :MMD,=DMM+,?O8= ,  ,                                                                          
#                                                                                                                                          ,=I77$ONNNZ?+ONMZ     =$D          ,+=::+$8NNMNDNMD7?,   ?MN                :~~:     ~D7          ,NI          ,M7   ~?ZNZ?,       8MM~                               =ZMMN~$MMMMMMMNMMD$ONMMMMD:                                                                     
#                                                                                                                                                        ~DMM=                   ~I7=,       =DMMMD7MMM,                   :+?=?O$:          ~N:          ~MN88D$:           NMM=,                              ~MMMMMMMMMMMMOZMMMMMM7::8MMI                                                                     
#                                                                                                                                                        , :DNNI                                :~IDMMND                        :::=?II?==~::ZN7=+I$ZZZ8DZ+~~:             IMMM~                               ~MMMNMMMMMI~:7NMMMMD7,: +NM8,                                                                     
#                                                                                                                                                            :NMM7,                                  ~MM+                               ,,,:~==~~~:  ,                    OMMN:                               ?NNMMMMM8,   ~NMNO,     =MMMN?,,                                                                   
#                                                                                   ,,,,,,,,                                                                    ,$8MMO=                                ~M8                                                              +MNO:                                ,MM~ ,        ::          ,~,          ,,:::,,,,                                                    
#                                                                          ,::,,,,                                                                                  ~ONND+                               OD+                                                          ?NMD,                                   ??                                            ,::::::,,                                            
#                                                             :=+??=:,,,,,                                                                                              ~?$D87I:                          ~Z?                                                      =$DM$:                                                                                           ,::,,,,,,,,                                  
#                                                       ,:~==~,   :+=,                                                                                                       $NNNNZ~             ,,:~~:    ,                                                    :DMMMI                                                                                                                                           
#                                              ,~~~~~:,,,             ,,,                                                                                                       ,~IMMMN8O+,             ,:~?7$Z7~,                                          :ZDMNNDNM8ZI                                                                                                                                         
#                                      ,,~~:,,                            ,                                                                                                          :$DNNMMN8?, ,            ,~7ZOO?:                                 ,:$NMMMM?     :7NMMD?,                                                                                                                                    
#                              ,:~~:,,,                                                                                                                                                      $NMMMMMNMNO?~             ~?ODDD$=,                :?8MMMMMD?~7NMMMD$~        :ONMMN?                                                                                                                               
#                     ,,,,,,,,,                                                                                                                                                                 ?$DMMMMMMMMMMD$?=~,        ,~7ZZODN87????I$ODNMDOZ$7I:         ~$ZDMD7==~      =$ZDND$++~,                                                                                                                       
#          ~?++=~~,                                                                                                                                                                                    ~+?II7ZNMMMMMM8$$$?~,           ,~?II7Z8DDOZ$77II+:            ~?IZDM8O$I~,   :??$8MMNZZ7+,                                                                                                               
#            ,                                                                           , ,+D7                                                                                                                   :=IZ8NMMMNNMNNO$=               ,:?ZDNNMMMNMND8Z7=,       =ZNMMMMMD?,,    :ONMNMMMN?,                                                                                                          
#                                                                                         ,MMMM7                                                                                                                             ,,::~IONNMMNNDDD8OZI=,         ,::::=+I$ONMNNNNDDDNNMMMMMMMMMD87:   ,:~=ZNNNDOI,            ~7$ZO8DDNNNNDD8O+:,                                                                     
#~,                                                                                       +MMMMDI?~                                                                                                                                       ,~+Z8DNDNNMMMMDD$+:,,, ,           ,~?7O8DNNNNNNMMMMMNOOZI??++?IZ88$:  ,,~ZDMMMMMMMMMMMMMMMMMMNNNNNMMMNND8$=,,                                                         
# ,~:                                                                                     NMMMMOZMM8:      ,7DZ~                                                                                                                                        ,,~IONMMMMMMMMMNDZ+~:               ,     ,=I8DNMMMMMNMNMMMMMDNMMMMNMMMNNNDDDDD8O8Z$7II+++IZDDMMNMN$,,                                                   
#   :~:                                                                                   MMMMMNMMM+ :, +?DOI~                                                                                                                                                     ,:~?7$$ZODDNMNN8Z7??+=~:,                 ,~=+?7I?=:,,,,:=?I7$$$$$$$ZZZOO8DDNNMMNNNNNMMMMNMZ+                                                 
#     ~=,                                                                                 MMMMMMMM8   ,NNNO                                         ,                                                                                                                             ,~?ZDNMNNNNNNND8O7?:,,,                                          ,~=7DMMMMMMMMMZ~                                              
#      ,:+~                                                                              ,MMMMMMMMO  ~N8: ,,:~,                            ,:~:,,,                                                                                        ,:~,                                              ,:~~=+++?7$O8DNNNNNMMN8$=,           ~+$ZO8DNNMMNNNND8OOOZ$+:, :=+I8MMMMDOI                                          
#         ,=+                                                                             MMMMMMMMMDMZ,         ~?:               ,,,,,                                                                                                         ,:~~~,                                                          ,NN?$NMMMMMMMMMMMN87~:,,,=+=:,,,,,,:?NMMNMMMMMMNNDNDI8MMM+  ,                                    
#            +=,                                                                          $MMMN?$NMN,            ,+?+:,    ,,:~~:,                                                                                                                    :=~,                                                      8M=     ,                :7ONNNO?~,   , :$NNMMMMMMMMMMMMMN,                                      
#             ,+?                                                                         ,NNO,,  ,                 :ODNNNZ:                                                                                                                                :?777I=                                             IMO           ,,=$Z7+~        ,?NNMMNZ:       :7NMMMMMNMMMM8                         , ,IDND~    
#               ,=~,                                                                        7I                :+I+~::,, ~?I~                                                                                                                              , ,~=~==:                                              ZMZ      ?8I:     :I$DND$?~      :?$8MMN$?:      ?ZDMMMMMMMM7                      +$NMMMMMI    
#                  ~~                                                                      ,             ,=+=:              ,==                                                                                                                       ::,               ,                                         ZMM:     ?NN8:        ,7NMMNI,       ,$NMMMO:       =NMMMNMM+                     I8NMMMM,     
#                    ~=                                                                          ,~:,,~~,                      ,:,                                                                                                              ,,,,                        , ,,                                   +MN8     ,~OMM8Z,        :+ZMNDOI       =IMMN8=      ,=NNMO                      ?NMMMD       
#                      ::,                                                                  ,,,::                                  ,:,                                                                                                       ,,                                                                      =MMO~    , ?NMMMI,         ,INMMMDI,     ~DMMN+,      NMO                      ?DNO~        
#                        ,~,                                                      ,,,::,                                                ,,                                                                                           ,                                                   ,,                            ,INMND+:    :MMM+              ~ZDDMMMD?~:$MMMMMMMMMMM?                                   
#                           ,,                                             :~~:,                                                                                                                                               ,:,                                                             ,,                          :ZMMMMNNMMMN,                   ,=ONMMMMNM$,,,,,,                                   ,,
#Z,                           :,                                   ,, ,~=~,                                                                                                                                                ,,                                                                                                  ,=?7$I= ,                        :~~~,                                      ,,,,  
#MD=                            ::                             ,,,,                                                                                                                                                  , ,,                                                                                                                                                                              ,,,,      
#MNMI                             ::                                                                                                                                                                            ,,,                                                                                                                                                                                 ,,,,         
#7MMM?         ,                   ,~:                                                                                                                                                                     :~:,                                                                                                                                                                                  ,:,             
# OMMMO:     ~NMD,                    :=:                                                                                                                                                            :+=:                                                                                                                                                                                    ,,,                 
# ~MMMN8:    NMMM~                      +?:                                                                                                                                                    ,:=++~                                                                                                                                                                                    ,:,,                    
#  $MMMMMNI,?MMMMZ ,DM7                   ,=I=                                                                                                                                           ~+~~:,                                                                                                                                                                                     ,:,,,                        
#  +MMO~OMMMMMMMMD MMM7 , ,                  =$~                                                                                                                                     ?OZ+                                                                                                                                                                                         ,:,                            
#  ~NMN: :+DNN7MMMNMMMDODMMN+                  :+?,                                                                                                                            +77+~:                                                                                                                                                                                         :::,                               
#   IMM+      ,NMMMMMMMMN?NM7                    ~7+,   ,                                                                                                                  :+$I,                                                            ,  +8?                                                                                                                         :+~                                   
#   =NMD,      NMMMMMM8~ ?NN,                      =ND?                                                                                                              ,=??:                                                                 ,8NMMMM=                                                                                                                    :++                                       
#    +DO,      ~ZZ$ODI  :8M~                  :=I8NMNMMD+,                                                                                                      ,:~~=:                                                                 , +8MO$DMD+   ~===~:                                                                                                         :~~:                                         
#                       :$~                 7NMD$,   ZMM8I?                                                                                                 ,~=:                                                                     , ZNN7,:MM8~,OMNMD8DMM=                                                                                                     ++:                                             
#                                        =ZNOI:    ?DND=  ,?I~                                                                                          ,,,:                                                                        ,$ND+ ?NMNNNNN7+,   7MN,                                                                                                 ,=+~                                                
#                                      :ZI:        :,        ,=7:                                                                                ::,,                                                                             $NN= 7NMMMM7:      :DMMMN8NMMDDMN7                                                                                     ,::,                                                    
#                                                               ~?=                                                                          ,,,                                                                                ,ZM=  DMMD8         ?MMMMNN7,    ,I+                                                                                  :~~,                                                       
#                                                                  =+,                                                                  ,,,                                                                                           ,,            =Z8:                                                                                           +$~                                                           
#                                                                    :~                                                                                                                                                                                                                                                                        ,,~~,                                                             
#                                                                        :,                                                                                                                                                                                                                                                                  ::,                                                                 
#                                                                         ::,                                                                                                                                                                                                                                                            ,:::,                                                                   
#                                                                            ,,                                                                                                                                                                                                                                                        ,~                                                                        
#                                                                               ,,                                                                                                                                                                                                                                                 ,,,                                                                           
#                                                                                                                                                                                                                                                                                                                                                                                                
#