前言:
需求:將(MM-DD-YYYYY)改成(DD-MM-YYYY)
項目:
- 檢查當前工作目錄的所有文件名,尋找美國風格的日期
- 如果找到,將改文件改名,交換月份和日期的位置,使之成爲歐洲風格
具體實現:
- 創建一個正則表達式,可以識別到沒過風格日期的文本模式
- 調用os.listdir(),找出工作目錄中的所有文件
- 循環遍歷每隔文件名,湧shutil.move()對改文件改名
#! python3
# renameDates.py - Renames filenames with American MM-DD-YYYY date format
# to European DD-MM-YYYY.
import shutil, os, re
# Create a regex that matches files with the American date format.
datePattern = re.compile(r"""^(.*?) # all text before the date
((0|1)?\d)- # one or two digits for the month
((0|1|2|3)?\d)- # one or two digits for the day
((19|20)\d\d) # four digits for the year (must start with 19 or 20)
(.*?)$ # all text after the date
""", re.VERBOSE)
# Loop over the files in the working directory.
for amerFilename in os.listdir('.'):
mo = datePattern.search(amerFilename)
# Skip files without a date.
if mo == None:
continue
# Get the different parts of the filename.
beforePart = mo.group(1)
monthPart = mo.group(2)
dayPart = mo.group(4)
yearPart = mo.group(6)
afterPart = mo.group(8)
# Form the European-style filename.
euroFilename = beforePart + dayPart + '-' + monthPart + '-' + yearPart + afterPart
# Get the full, absolute file paths.
absWorkingDir = os.path.abspath('.')
amerFilename = os.path.join(absWorkingDir, amerFilename)
euroFilename = os.path.join(absWorkingDir, euroFilename)
# Rename the files.
print('Renaming "%s" to "%s"...' % (amerFilename, euroFilename))
#shutil.move(amerFilename, euroFilename) # uncomment after testing
擴展:
- 爲文件名添加前綴,諸如添加test_,將eggs.txt改成test_eggs.txt
- 更改日期風格
- 刪除文件名中的0,如asd001.txt