在 Python 中将日期从 mm/dd/yyyy 转换为另一种格式
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Convert date from mm/dd/yyyy to another format in Python
提问by user3307366
I am trying to write a program that asks for the user to input the date in the format mm/dd/yyyy and convert it. So, if the user input 01/01/2009, the program should display January 01, 2009. This is my program so far. I managed to convert the month, but the other elements have a bracket around them so it displays January [01] [2009].
我正在尝试编写一个程序，要求用户以 mm/dd/yyyy 格式输入日期并进行转换。所以，如果用户输入 01/01/2009，程序应该显示 2009 年 1 月 1 日。这是我目前的程序。我设法转换了月份，但其他元素在它们周围有一个括号，所以它显示了一月 [01] [2009]。
date=input('Enter a date(mm/dd/yyy)')
replace=date.replace('/',' ')
convert=replace.split()
day=convert[1:2]
year=convert[2:4]
for ch in convert:
if ch[:2]=='01':
print('January ',day,year )
Thank you in advance!
先感谢您！
采纳答案by alecxe
Don't reinvent the wheel and use a combination of strptime()and strftime()from datetimemodule which is a part of python standard library (docs):
不要重新发明轮子并使用strptime()和strftime()fromdatetime模块的组合，它是 python 标准库（docs）的一部分：
>>> from datetime import datetime
>>> date_input = input('Enter a date(mm/dd/yyyy): ')
Enter a date(mm/dd/yyyy): 11/01/2013
>>> date_object = datetime.strptime(date_input, '%m/%d/%Y')
>>> print(date_object.strftime('%B %d, %Y'))
November 01, 2013
回答by Snoop Dogg
Split it by the slashes
用斜线分割
convert = replace.split('/')
and then create a dictionary of the months:
然后创建一个月份的字典：
months = {1:"January",etc...}
and then to display it do:
然后显示它：
print months[convert[0]] + day + year
回答by shrnkrn
You might want to look into python's datetime library which will take care of interpreting dates for you. https://docs.python.org/2/library/datetime.html#module-datetime
您可能想查看 python 的 datetime 库，它将为您解释日期。https://docs.python.org/2/library/datetime.html#module-datetime
from datetime import datetime
d = input('Enter a date(mm/dd/yyy)')
# now convert the string into datetime object given the pattern
d = datetime.strptime(d, "%m/%d/%Y")
# print the datetime in any format you wish.
print d.strftime("%B %d, %Y")
You can check what %m, %d and other identifiers stand for here: https://docs.python.org/2/library/datetime.html#strftime-and-strptime-behavior
您可以在此处查看 %m、%d 和其他标识符的含义：https: //docs.python.org/2/library/datetime.html#strftime-and-strptime-behavior
回答by behzad.nouri
As a suggestion use dateutil, which infers the format by itself:
作为建议使用dateutil，它自己推断格式：
>>> from dateutil.parser import parse
>>> parse('01/05/2009').strftime('%B %d, %Y')
'January 05, 2009'
>>> parse('2009-JAN-5').strftime('%B %d, %Y')
'January 05, 2009'
>>> parse('2009.01.05').strftime('%B %d, %Y')
'January 05, 2009'
