1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
"""Collection of utilities for command-line interfaces and console scripts."""
import os
import re
numberAddedRE = re.compile(r"#\d+$")
def makeOutputFileName(input, outputDir=None, extension=None, overWrite=False):
"""Generates a suitable file name for writing output.
Often tools will want to take a file, do some kind of transformation to it,
and write it out again. This function determines an appropriate name for the
output file, through one or more of the following steps:
- changing the output directory
- replacing the file extension
- suffixing the filename with a number (``#1``, ``#2``, etc.) to avoid
overwriting an existing file.
Args:
input: Name of input file.
outputDir: Optionally, a new directory to write the file into.
extension: Optionally, a replacement for the current file extension.
overWrite: Overwriting an existing file is permitted if true; if false
and the proposed filename exists, a new name will be generated by
adding an appropriate number suffix.
Returns:
str: Suitable output filename
"""
dirName, fileName = os.path.split(input)
fileName, ext = os.path.splitext(fileName)
if outputDir:
dirName = outputDir
fileName = numberAddedRE.split(fileName)[0]
if extension is None:
extension = os.path.splitext(input)[1]
output = os.path.join(dirName, fileName + extension)
n = 1
if not overWrite:
while os.path.exists(output):
output = os.path.join(
dirName, fileName + "#" + repr(n) + extension)
n += 1
return output
|
