How to get timestamp in Python

How to obtain timestamps in Python: 1. Use the `time()` function of the `time` module; 2. Use the `timestamp()` function of the `datetime` module; 3. Use the `calendar` module `timegm()` function; 4. Use the third-party library `arrow`.

#Python is a powerful programming language that provides many built-in functions and modules for working with dates and times. One of the common needs is to get the timestamp of the current time. A timestamp is a number that represents time, usually calculated as a certain unit of time (seconds, milliseconds, etc.) from a specific date (usually January 1, 1970).

In Python, we can use the `time` module to get timestamps. The following are some common methods:

1. Use the `time()` function of the `time` module

`time()` in the `time` module The function returns the timestamp of the current time in seconds.

import time
timestamp = time.time()
print(timestamp)

Output:

1623202016.3350923

2. Use the `timestamp()` function of the `datetime` module

The `datetime` module also provides access Timestamp method. Datetime objects can be converted to timestamps using the `timestamp()` function of the `datetime` module.

import datetime
now = datetime.datetime.now() # 获取当前时间
timestamp = now.timestamp()
print(timestamp)

Output:

1623202016.3350923

3. Use the `timegm()` function of the `calendar` module

The `calendar` module provides some processing Useful functions for date and time. The `timegm()` function can accept a time tuple parameter similar to `struct_time` and return the corresponding timestamp.

import calendar
import time
now = time.gmtime() # 获取当前时间的时间元组
timestamp = calendar.timegm(now)
print(timestamp)

Output:

1623202016

4. Use the third-party library `arrow`

`arrow` is a popular third-party library that provides More convenient and easy-to-use date and time processing functions. You can use `arrow` to get the timestamp.

First, you need to install the `arrow` library:

pip install arrow

Then use `arrow` in the code to get the timestamp.

import arrow
timestamp = arrow.now().timestamp()
print(timestamp)

Output:

1623202016

No matter which method is used, the timestamp obtained is a floating point number, and other functions can be used to convert it to the required format. For example, the timestamp can be converted to local time using the `localtime()` function of the `time` module.

import time
timestamp = time.time()
local_time = time.localtime(timestamp)
print(local_time)

Output:

time.struct_time(tm_year=2021, tm_mon=6, tm_mday=9, tm_hour=21, tm_min=53, 
tm_sec=36, tm_wday=2, tm_yday=160, tm_isdst=0)

In short, Python provides us with several simple and flexible methods to get the timestamp of the current time. Choose the appropriate method according to your needs and easily obtain the required timestamp.

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