Python给我们提供了大量的模块供我们使用，先来看一下时间模块

time模块

API方法

• time()获取当前的时间(距离1970年的秒数)
• sleep()使CPU睡眠
• clock()计算CPU的执行时间
• strftime() 格式化时间

print(time.strftime('%Y-%m-%d:%H:%M:%S'))
# 2017-10-19:16:32:59
    
    %Y  Year with century as a decimal number.
    %m  Month as a decimal number [01,12].
    %d  Day of the month as a decimal number [01,31].
    %H  Hour (24-hour clock) as a decimal number [00,23].
    %M  Minute as a decimal number [00,59].
    %S  Second as a decimal number [00,61].
    %z  Time zone offset from UTC.
    %a  Locale's abbreviated weekday name.
    %A  Locale's full weekday name.
    %b  Locale's abbreviated month name.
    %B  Locale's full month name.
    %c  Locale's appropriate date and time representation.
    %I  Hour (12-hour clock) as a decimal number [01,12].
    %p  Locale's equivalent of either AM or PM.

• strptime(str,format) 将字符串时间转化为结构化的时间

# 通过strptime转化字符串时间后，获取指定的时间的字段
time = time.strptime('2017-01-01 23:59:44','%Y-%m-%d %H:%M:%S')
print(time.tm_year)
print(time.tm_mon)
print(time.tm_mday)

• ctime() 将字符串时间转化为时间戳

time.ctime(senconds) 

• localtime() 获取当前时间的结构化时间

print(time.localtime())
>>> time.struct_time(tm_year=2017, tm_mon=10, tm_mday=19, tm_hour=16, tm_min=47, tm_sec=21, tm_wday=3, tm_yday=292, tm_isdst=0)

• mktime() 转换时间戳

# 获取当前时间时间戳
temp_time = time.mktime(time.localtime())
print(temp_time)
# 时间戳转格式化时间
print(time.ctime(temp_time))

datetime模块

• datetime.datetime.now() 获取当前格式化时间

time = datetime.datetime.now()
print(type(time))
print(time)
>>> <class 'datetime.datetime'>
2017-10-19 16:53:45.560341