问题描述
通过python,我尝试计算从9999年12月31日到0001年1月1日的天数
import time
def days_diff(a,b):
timestr_1 = "{},{},{}".format(a[0],a[1],a[2])
time_1 = time.strptime(timestr_1,"%Y,%m,%d")
timestr_2 = "{},{}".format(b[0],b[1],b[2])
time_2 = time.strptime(timestr_2,%d")
return int(abs(time.mktime(time_2) - time.mktime(time_1)) // 86400)
if __name__ == '__main__':
print("Example:")
print(days_diff((1,1,1),(9999,12,31)))
但是
ValueError: time data '1,1' does not match
format '%Y,%d'
解决方法
%Y
、%m
和 %d
期望数字的长度分别为 4、2 和 2。您可以通过以下方式解决该问题:
import time
def padder(n,length):
return str(n).zfill(length)
def days_diff(a,b):
a = [padder(n,length) for n,length in zip(a,(4,2,2))]
b = [padder(n,length in zip(b,2))]
timestr_1 = "{},{},{}".format(a[0],a[1],a[2])
time_1 = time.strptime(timestr_1,"%Y,%m,%d")
timestr_2 = "{},{}".format(b[0],b[1],b[2])
time_2 = time.strptime(timestr_2,%d")
return int(abs(time.mktime(time_2) - time.mktime(time_1)) // 86400)
if __name__ == '__main__':
print("Example:")
print(days_diff((1,1,1),(9999,12,31)))
但这不起作用(您得到 OverflowError
),因为 mktime 不支持日期范围。
相反,请尝试使用 datetime.datetime
:
import datetime as dt
def days_diff(a,b):
time_1 = dt.datetime(*a)
time_2 = dt.datetime(*b)
diff = time_2-time_1
return diff.days * 24 * 3600 + diff.seconds
if __name__ == '__main__':
print("Example:")
print(days_diff((1,31)))