Python小技巧练习分享

def reverse_number(number):
    baiwei = int(number/100)
    shiwei = int(number%100/10)
    gewei = int(number%10)
    return gewei*100+shiwei*10+baiwei
new_number = reverse_number(789)
print(new_number)

class My_Class(object):
    """你好"""
print(My_Class.__doc__)

coding[=:]\s*([-\w.]+)

# -*- coding:utf-8 -*-

# -*- coding:UTF-8 -*-

def reverse_str(my_str,offset):
    # 如果数字为 0，顺序默认不变
    if offset ==0:
        return my_str
    left = my_str[:len(my_str)-offset]
    right = my_str[len(my_str)-offset:]
    return right + left

# 打印一行 >>>
progress_str = ">" * 100
print(progress_str)

# 打印一行 >>>
progress_str = ">"*20
# 填充50个 -
progress_str = progress_str.ljust(100,'/')
print(progress_str)

import time
for i in range(0, 11):
    time.sleep(0.3)
    current = i/10
    # 进度条
    progress_str = '{0:s}{1:.0%}'.fORMat(
        (int(current*10)*'>').ljust(10, '/'), current)
    print(progress_str)

import time
for i in range(0, 11):
    time.sleep(0.3)
    current = i/10
    # 进度条
    progress_str = '{0:s}{1:.0%}'.format(
        (int(current*10)*'>').ljust(10, '/'), current)
    print(f'\r{progress_str}',end='')

file = open('runtime.log', 'a+', encoding='utf-8')
print('测试日志', file=file)

def merge(l1, l2):
    my_list = l1 + l2
    n = len(my_list)
    for i in range(n):
        for j in range(0, n - i - 1):
            if my_list[j] > my_list[j + 1]:
                my_list[j], my_list[j + 1] = my_list[j + 1], my_list[j]
    print(my_list)

if __name__ == '__main__':
    my_list1 = [4, 2, 6]
    my_list2 = [1, 3]
    merge(my_list1, my_list2)