python 生成唯一id的四种方式

import shortuuid
import uuid
# 生成一个标准格式32位UUID，参数为位数
def new_uuid(length=None):
    if length is None:
        return str(uuid.uuid1())
    else:
        return str(shortuuid.ShortUUID().random(length=length))

import uuid
uid = uuid.uuid1()
print(uid)
print(uid.hex)

import bson
demoid = bson.ObjectId()print(demoid)

pip install pysnowflake -i https://pypi.tuna.tsinghua.edu.cn/simple/

# Importing the `snowflake.client` module.
import snowflake.client

# Calling the `get_guid()` function from the `snowflake.client` module.
uuid = snowflake.client.get_guid()

# Printing the value of the `uuid` variable.
print(uuid)

# Printing the binary representation of the `uuid` variable.
print(bin(uuid))

# 4674877370191056897
# 0b100000011100000100000000011001100011010110000000001000000000001

import time
import datetime
 
t = time.time()
 
print (t)                       #原始时间数据
print (int(t))                  #秒级时间戳
print (int(round(t * 1000)))    #毫秒级时间戳
print (int(round(t * 1000000))) #微秒级时间戳

dt = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
dt_ms = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f') # 含微秒的日期时间，来源 比特量化
print(dt)
print(dt_ms)

dt = '2018-01-01 10:40:30'
ts = int(time.mktime(time.strptime(dt, "%Y-%m-%d %H:%M:%S")))
print (ts)

dt2 = '2023-02-04T02:12:05.047Z'
dt = dt2[0:19].replace('T', ' ')
ts = int(time.mktime(time.strptime(dt, "%Y-%m-%d %H:%M:%S")))

ts = 1515774430
dt = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(ts))
print(dt)

dt = '08/02/2019 01:00'
dt_new = datetime.datetime.strptime(dt, '%m/%d/%Y %H:%M').strftime('%Y-%m-%d %H:%M:%S')
print(dt_new)

ta_dt = time.strptime("2018-09-06 21:54:46", '%Y-%m-%d %H:%M:%S')  #日期时间转结构体 
ta_ms = time.localtime(1486188476) #时间戳转结构体，注意时间戳要求为int，来源 比特量化
print(ta_dt)
print(ta_ms)

import time
print(time.time_ns())