如何使用箭头增加日期？

Question

I'm using the arrow module to handle datetime objects in Python. If I get current time like this:

now = arrow.now()

...how do I increment it by one day?

Answer 1

Update as of 2020-07-28

Increment the day

now.shift(days=1)

Decrement the day

now.shift(days=-1)

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Original Answer

DEPRECATED as of 2019-08-09

https://arrow.readthedocs.io/en/stable/releases.html

• 0.14.5 (2019-08-09) [CHANGE] Removed deprecated replace shift functionality. Users looking to pass plural properties to the replace function to shift values should use shift instead.
• 0.9.0 (2016-11-27) [FIX] Separate replace & shift functions

Increment the day

now.replace(days=1)

Decrement the day

now.replace(days=-1)

I highly recommend the docs.

Answer 2

The docs state that shift is to be used for adding offsets:

now.shift(days=1)

The replace method with arguments like days , hours , minutes , etc. seems to work just as shift does, though replace also has day , hour , minute , etc. arguments that replace the value in given field with the provided value.

In any case, I think eg now.shift(hours=-1) is much clearer than now.replace .

Answer 3

See documentation

now = arrow.now()
oneDayFromNow = now.replace(days+=1)