-#!/usr/bin/env python3.6
-
-import sys
-
-fn = sys.argv[1]
-out = sys.argv[2]
-with open(fn, "rb") as fd:
- lines = fd.read().split(b"\n")
-
-def dup(lines, what):
- idx = []
- met = False
- for i, line in enumerate(lines):
- if line == "":
- break
- if met:
- if line.startswith(b" "):
- idx.append(i)
- continue
- else:
- met = False
- if line.startswith(what):
- if len(idx) == 0:
- idx.append(i)
- met = True
- else:
- return [l for n, l in enumerate(lines) if n not in idx]
- return lines
-
-lines = dup(lines, b"To")
-lines = dup(lines, b"From")
-lines = dup(lines, b"Subject")
-with open(out, "wb") as fd:
- fd.write(b"\n".join(lines))