操作一个字符串数组并替换它们。

Question

这是个涉及到字符串操作的问题，例如

unique_dates = ["January 12,1988","February 11,1995","December 2,1992"]

我想把 "一月 "改为1，"二月 "改为2，以此类推。另外，我还需要去掉两者之间的空格和定界符，我该怎么做呢？

Answer 1

from datetime import datetime
unique_dates = ["January 12,1988","February 11,1995","December 2,1992"]
ans = []
for val in unique_dates:
  objDate = datetime.strptime(val, '%B %d,%Y')
  ans.append(objDate.strftime('%d/%m/%Y'))
print(unique_dates, ans)

参考python中的datetime模块

Answer 2

首先使用 strptime 然后用 strftime. 可以在一条线上做为：

from time import strptime, strftime

unique_dates = ["January 12,1988","February 11,1995","December 2,1992"]

[strftime('%d/%m/%Y', strptime(i, '%B %d,%Y'))  for i in unique_dates]
>>> ['12/01/1988', '11/02/1995', '02/12/1992']