一文了解Python基础:字面量、注释、变量、类型、运算符

2023

2354.1545

print("Biomamba")

print('biomamba')name = input()print('I am '+name)name = input('请告诉我你是谁')print('I am '+name)

Action = '学python'print(f"Biomamba 在2023年  {Action}")Action = '学python'print(f"Biomamba 在{2000 + 23}年  {Action}")

# 将内容转换为字符串，放入占位位置Action = '学python'message = "Biomamba %s" % Actionprint(message)message = "Biomamba 在%s年 %s" % (2023,Action)print(message)# 将内容转换为整数，放入占位位置：message = "Biomamba 在%d年 %s" % (2023.003,Action)print(message)# 将内容转换为浮点型数值，放入占位位置：message = "Biomamba 在%f年 %s" % (2023.003,Action)print(message)# 占位时控制浮点数精度：# %5d 设置数字宽度为5(包含小数点)# %.f 控制小数点后位数# 将内容转换为浮点型数值，控制精度后放入占位位置：message = "Biomamba 在%5d年 %s" % (2023.003,Action)print(message)message = "Biomamba 在%.2f年 %s" % (2023.003,Action)print(message)# 联用时d需省略Action = '学python'message = "Biomamba %s" % Actionprint(message)message = "Biomamba 在%10d年 %s" % (2023, Action)print(message)message = "Biomamba 在%5.2f年 %s" % (2023, Action)print(message)

True

False

# 这是一个单行注释

"""这是一个多行注释需要三个引号与代码相区分"""

year = 2022print(year)

year = 2023print(year)

year = 2023type(year)

weight = 75.00type(weight)

myname = 'Biomamba'type(myname)

type(int(2023.00))

type(float(2023))

type(str(2023))

1+19/39//49%49**4

mynum = 5mynum += 1mynum #等同于：mynum = 5mynum = mynum + 1mynum

mynum = 5mynum -= 1mynum #等同于：mynum = 5mynum = mynum - 1mynum

mynum = 5mynum *= 2mynum #等同于：mynum = 5mynum = mynum * 2mynum