Add script for exchange of fasta headers with enumeration.

scripts/reduce_fasta_headers.py

+#!/usr/bin/python3
+
+import os
+import argparse
+
+parser = argparse.ArgumentParser(description = 'Reduce fasta headers to unique number and keep a file with original headers')
+parser.add_argument('--fasta', '-f', required = True, help = 'The fasta file')
+args = parser.parse_args()
+
+fasta_in = args.fasta
+fasta_out = "{0}.{2}.{1}".format(*os.path.basename(fasta_in).rsplit('.', 1), 'enumerated')
+
+headers_dict = {}
+identifier = 1
+
+o = open(fasta_out, 'w')
+with open(fasta_in) as f:
+    for line in f:
+        if line.startswith(">"):
+            header = line.strip().lstrip('>')
+            headers_dict[identifier] = header
+            o.write(">{}\n".format(identifier))
+            identifier += 1
+        else:
+            o.write(line)
+o.close()
+
+headers_dict_file = 'header_dictionary.tsv'
+with open(headers_dict_file, 'w') as o:
+    for key in headers_dict:
+        o.write("{}\t{}\n".format(key, headers_dict[key]))