diff replace_delimiter/replace_delimiter.py @ 0:295395b4b28f draft default tip

Uploaded

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/replace_delimiter/replace_delimiter.py	Tue Oct 07 19:43:01 2014 -0400
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+#By, Guruprasad Ananda.
+
+import sys, re
+
+def stop_err(msg):
+    sys.stderr.write(msg)
+    sys.exit()
+
+def main():
+    if len(sys.argv) != 5:
+        stop_err("usage: convert_characters infile from_char to_char outfile")
+
+    try:
+        fin = open(sys.argv[1],'r')
+    except:
+        stop_err("Input file cannot be opened for reading.")
+
+    from_char = sys.argv[2]
+    to_char = sys.argv[3]
+
+    try:
+        fout = open(sys.argv[4],'w')
+    except:
+        stop_err("Output file cannot be opened for writing.")
+
+    char_dict = {
+        'T': '\t',
+        's': '\s',
+        'Dt': '\.',
+        'C': ',',
+        'D': '-',
+        'U': '_',
+        'P': '\|',
+        'Co': ':',
+        'Sc': ';'
+    }
+    from_ch = char_dict[from_char] + '+'    #making an RE to match 1 or more occurences.
+    to_char = char_dict[to_char]
+    skipped = 0
+
+    for line in fin:
+        line = line.strip()
+        try:
+            fout.write("%s\n" %(re.sub(from_ch, to_char, line)))
+        except:
+            skipped += 1
+
+    fout.close()
+    fin.close()
+    if skipped:
+        print "Skipped %d lines as invalid." %skipped
+
+if __name__ == "__main__":
+    main()