Python字符串类型的格式化——(.format())

# 字符串类型格式化
formats = "姓名:{}，年龄:{}，性别:{}".format("马云","16","男")
print(formats)
# 姓名:马云，年龄:16，性别:男
formats = "姓名:{2}，年龄:{1}，性别:{0}".format("马云","16","男")
#曹中的数字代表format的中的第几个参数
print(formats)
# 姓名:男，年龄:16，性别:马云

Str = "{0:=^20}".format("PYTHON")
print(Str)
# =======PYTHON=======
Str = "{0:\>20}".format("PYTHON")
print(Str)
# \\\\\\\\\PYTHON
Str = "{:10}".format("Python")
print(Str)
# Python右边长度为10的空格

num = "{0:.2f}".format(123456.789132)
print(num)
# 123456.79
num = "{0:b},{0:c},{0:d},{0:o},{0:x},{0:X}".format(42500)
# {0:b}二进制格式，{0:c}Unicode编码形式，{0:d}十进制表示形式，{0:o}八进制，{0:x}十六进制，{0:X}大写的十六进制
print(num)
# 1010011000000100,ꘄ,42500,123004,a604,A604
num = "{0:e},{0:E},{0:F},{0:%}".format(45.6)
# {0:e}科学计数法e表示,{0:E}科学计数法E表示，{0:F}通常非科学计数法
print(num)
# 4.560000e+02,4.560000E+02,456.000000,45600.000000%