MrDarren的博客

基础一赋值a = b = c = d = 10e记法a = 0.000000025b = 2.5e-8print(a, "\n")print(b)变量类型转换a = "520"b = int(a)ba = 5.99b = int(a)ba = "520"b = float(a)bb = str(5e+19)ba = "520"type(a)...

独立程序"""report.py"""#from random import choice #method_1import random #method_2def get_description(): 'Return random weather, just like the pros' possibilities = ['rain', 'sleet', 'fog',..

for循环使用zip()迭代days = ['Monday', 'Tuesday', 'Wednesday']fruits = ['banana', 'orange', 'peach']drinks = ['coffee', 'tea', 'beer']for day, fruit, drink in zip(days, fruits, drinks): print(day, "...

定义calss对象class Person(): def __init__(self, name): self.name = namehunter = Person('Daye')print(hunter.name)Daye继承class Car(): def exclaim(self): print("I am a Car!")...

格式化使用%的旧版格式化num = 43f = 7.03s = 'String'print("%-10.4d %-10.4f %-10.4s" % (num, f, s))print("%*.*d %*.*f %*.*s" % (10, 4, num, 10, 4, f, 10, 4, s))0043 7.0300 Stri 0043 ...

python学习将暂停一段时间，请原谅我精力有限，文件输入/输出fileobj = open(filemane, mode)fileobj :是open()返回的文件对象filename:是该文件的字符串名mode:文件类型和操作的字符串mode第一个字母：r:读模式w:写模式。如果文件不存在则新创建，如果存在则重写新内容x:在文件不存在的情况下新创新并写文件a:如果文件存在...