diff rDiff/tools/helper.py @ 2:233c30f91d66

updated python based GFF parsing module which will handle GTF/GFF/GFF3 file types

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rDiff/tools/helper.py	Tue Oct 08 07:15:44 2013 -0400
@@ -0,0 +1,179 @@
+#!/usr/bin/env python
+"""
+Common utility functions
+"""
+
+import os 
+import re
+import sys 
+import gzip 
+import bz2
+import numpy 
+
+def init_gene_DE():
+    """
+    Initializing the gene structure for DE
+    """
+    gene_det = [('id', 'f8'), 
+                    ('chr', 'S15'), 
+                    ('exons', numpy.dtype),
+                    ('gene_info', numpy.dtype),
+                    ('is_alt_spliced', 'f8'), 
+                    ('name', 'S25'),
+                    ('source', 'S25'),
+                    ('start', 'f8'),
+                    ('stop', 'f8'), 
+                    ('strand', 'S2'), 
+                    ('transcripts', numpy.dtype)]
+
+    return gene_det
+
+def _open_file(fname):
+    """
+    Open the file (supports .gz .bz2) and returns the handler
+    """
+    try:
+        if os.path.splitext(fname)[1] == ".gz":
+            FH = gzip.open(fname, 'rb')
+        elif os.path.splitext(fname)[1] == ".bz2":
+            FH = bz2.BZ2File(fname, 'rb')
+        else:
+            FH = open(fname, 'rU')
+    except Exception as error:
+        sys.exit(error)
+    return FH
+
+def make_Exon_cod(strand_p, five_p_utr, cds_cod, three_p_utr):
+    """
+    Create exon cordinates from UTR's and CDS region
+    """
+    exon_pos = []
+    if strand_p == '+':        
+        utr5_start, utr5_end = 0, 0
+        if five_p_utr != []:
+            utr5_start, utr5_end = five_p_utr[-1][0], five_p_utr[-1][1] 
+        cds_5start, cds_5end = cds_cod[0][0], cds_cod[0][1]
+        jun_exon = []
+        if cds_5start-utr5_end == 0 or cds_5start-utr5_end == 1:
+            jun_exon = [utr5_start, cds_5end]    
+        if len(cds_cod) == 1:
+            five_prime_flag = 0
+            if jun_exon != []:
+                five_p_utr = five_p_utr[:-1]
+                five_prime_flag = 1
+            for utr5 in five_p_utr:
+                exon_pos.append(utr5)
+            jun_exon = []
+            utr3_start, utr3_end = 0, 0
+            if three_p_utr != []: 
+                utr3_start = three_p_utr[0][0]
+                utr3_end = three_p_utr[0][1]
+            if utr3_start-cds_5end == 0 or utr3_start-cds_5end == 1:
+                jun_exon = [cds_5start, utr3_end]
+            three_prime_flag = 0
+            if jun_exon != []: 
+                cds_cod = cds_cod[:-1]
+                three_p_utr = three_p_utr[1:]
+                three_prime_flag = 1
+            if five_prime_flag == 1 and three_prime_flag == 1:
+                exon_pos.append([utr5_start, utr3_end])
+            if five_prime_flag == 1 and three_prime_flag == 0:
+                exon_pos.append([utr5_start, cds_5end])
+                cds_cod = cds_cod[:-1]
+            if five_prime_flag == 0 and three_prime_flag == 1:
+                exon_pos.append([cds_5start, utr3_end])
+            for cds in cds_cod:
+                exon_pos.append(cds)
+            for utr3 in three_p_utr:
+                exon_pos.append(utr3)
+        else:    
+            if jun_exon != []:
+                five_p_utr = five_p_utr[:-1]
+                cds_cod = cds_cod[1:]
+            for utr5 in five_p_utr:
+                exon_pos.append(utr5)
+            exon_pos.append(jun_exon) if jun_exon != [] else ''
+            jun_exon = []
+            utr3_start, utr3_end = 0, 0
+            if three_p_utr != []:
+                utr3_start = three_p_utr[0][0]
+                utr3_end = three_p_utr[0][1]
+            cds_3start = cds_cod[-1][0]
+            cds_3end = cds_cod[-1][1]
+            if utr3_start-cds_3end == 0 or utr3_start-cds_3end == 1:       
+                jun_exon = [cds_3start, utr3_end]
+            if jun_exon != []:
+                cds_cod = cds_cod[:-1]
+                three_p_utr = three_p_utr[1:]
+            for cds in cds_cod:
+                exon_pos.append(cds)
+            exon_pos.append(jun_exon) if jun_exon != [] else ''
+            for utr3 in three_p_utr:
+                exon_pos.append(utr3)
+    elif strand_p == '-':
+        utr3_start, utr3_end = 0, 0        
+        if three_p_utr != []:
+            utr3_start = three_p_utr[-1][0]
+            utr3_end = three_p_utr[-1][1]
+        cds_3start = cds_cod[0][0]
+        cds_3end = cds_cod[0][1]
+        jun_exon = []
+        if cds_3start-utr3_end == 0 or cds_3start-utr3_end == 1:
+            jun_exon = [utr3_start, cds_3end]  
+        if len(cds_cod) == 1:    
+            three_prime_flag = 0
+            if jun_exon != []:
+                three_p_utr = three_p_utr[:-1]
+                three_prime_flag = 1
+            for utr3 in three_p_utr:
+                exon_pos.append(utr3)
+            jun_exon = []
+            (utr5_start, utr5_end) = (0, 0)
+            if five_p_utr != []:
+                utr5_start = five_p_utr[0][0]
+                utr5_end = five_p_utr[0][1]
+            if utr5_start-cds_3end == 0 or utr5_start-cds_3end == 1:
+                jun_exon = [cds_3start, utr5_end]
+            five_prime_flag = 0
+            if jun_exon != []:
+                cds_cod = cds_cod[:-1]
+                five_p_utr = five_p_utr[1:]
+                five_prime_flag = 1
+            if three_prime_flag == 1 and five_prime_flag == 1:
+                exon_pos.append([utr3_start, utr5_end])
+            if three_prime_flag == 1 and five_prime_flag == 0:
+                exon_pos.append([utr3_start, cds_3end])
+                cds_cod = cds_cod[:-1]
+            if three_prime_flag == 0 and five_prime_flag == 1:
+                exon_pos.append([cds_3start, utr5_end])        
+            for cds in cds_cod:
+                exon_pos.append(cds)
+            for utr5 in five_p_utr:
+                exon_pos.append(utr5)
+        else:
+            if jun_exon != []:
+                three_p_utr = three_p_utr[:-1]
+                cds_cod = cds_cod[1:]
+            for utr3 in three_p_utr:
+                exon_pos.append(utr3)   
+            if jun_exon != []:
+                exon_pos.append(jun_exon)
+            jun_exon = []
+            (utr5_start, utr5_end) = (0, 0)
+            if five_p_utr != []:
+                utr5_start = five_p_utr[0][0]
+                utr5_end = five_p_utr[0][1]    
+            cds_5start = cds_cod[-1][0]
+            cds_5end = cds_cod[-1][1]
+            if utr5_start-cds_5end == 0 or utr5_start-cds_5end == 1:
+                jun_exon = [cds_5start, utr5_end]
+            if jun_exon != []:
+                cds_cod = cds_cod[:-1]
+                five_p_utr = five_p_utr[1:]
+            for cds in cds_cod:
+                exon_pos.append(cds)
+            if jun_exon != []:
+                exon_pos.append(jun_exon)    
+            for utr5 in five_p_utr:
+                exon_pos.append(utr5)
+    return exon_pos