Python常用函数

Request

import requests

def send_withParam(p1,p2):
    #url,{}为字符串占位符
    url = 'http://localhost:80/platform/getCameraUrl'.format("")
    #http参数
    payload = {
        "param1": p1,
        "param2": p2
    }
    #http请求头
    headers = {
        'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36',
        'Cookie': 'JSESSIONID=XXXX'
    }
    #发送请求
    res = requests.get(url, params=payload, headers=headers)
    return res;

res = send_withParam('1','2');
print(res.text);

文件读写

open写文件

#传统模式，不够安全，需要手动关闭文件资源
#如果在关闭文件之前程序异常终止，
#被打开的文件不能被关闭，占用系统资源

f = open('newFile1.txt','w')
f.write('这种模式写入不够安全，请慎用')
f.close()

#推荐模式，即使程序异常终止
#也会自动关闭文件
#类似于 try catch
with open('newFile2.txt','w') as f:
    f.write('推荐使用这种模式')

#内容追加模式
with open('newFile2.txt','a') as f:
    f.write('不会覆盖已有内容')

open读文件

#读文件,一次性读所有内容,适用文件大小较小
with open('newFile1.txt','r') as f:
    print(f.read())

#读文件,循环读,每次只读指定大小的内容，适用文件大小较大
with open('newFile1.txt','r') as f:
while True:
    print(f.read(2))

# 打开GBK文件
with open('newFile1.txt','r',encoding='gbk') as f:
    print(f.read())

#按行读取内容
with open('newFile1.txt','r') as f:
    for line in f.readlines():
        print(line)

日期时间

遍历起止日期

import datetime
def main():
    begin = datetime.date(2014,6,1)
    end = datetime.date(2014,6,7)
    for i in range((end - begin).days+1):
        day = begin + datetime.timedelta(days=i)
        print(day)

if __name__ == '__main__':
    main()

分钟遍历(不能跨天)

# 导入datetime库
import datetime

# 创建开始时间点和结束时间点
d1 = datetime.datetime(2022,4,27,0,0,0)
d2 = datetime.datetime(2022,4,27,23,59,59)

# 获取时间间隔
delta = d2 - d1
# 遍历获得每一个时间点(分钟)
for i in range(delta.seconds + 1):
    if i%60 == 0:
        print(d1 + datetime.timedelta(seconds = i))

秒遍历(跨天)

import datetime

d1 = datetime.datetime(2022,4,24,0,0,0)
d2 = datetime.datetime(2022,4,27,23,59,59)

# 获取时间间隔
delta = d2 - d1
# 遍历天数
for d in range(delta.days+1):
    # 遍历时间秒(最大为二十四小时的秒数)
    seconds = range(delta.seconds + 1);
    for s in seconds:
        # 每5s进入执行一次
        if s%5 == 0:
            # 设置开始天
            beginDay = d1 + datetime.timedelta(days=d);
            # 设置起始时间
            start = beginDay + datetime.timedelta(seconds = s);
            end = beginDay + datetime.timedelta(seconds = s+5);
            #打印在控制台中
            print(start,end);