strptime

使用strptime来格式化字符串

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datetime.datetime.strptime("2019-10-02", "%Y-%m-%d")

# datetime.datetime(2019, 1, 2, 0, 10)

timedelta

使用timedelta来进行计算天数

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a = datetime.datetime.strptime("2019-10-02", "%Y-%m-%d")

b = datetime.datetime.strptime("2019-10-01", "%Y-%m-%d")

a - b

# datetime.timedelta(1)

(a - b).days

# 1