python学习-22 字符串格式化

print('i am %s sex boy is ljj'%123)

i am 123 sex boy is ljj

Process finished with exit code 0

print('i am %s sex boy is %s'%('13','ss'))

i am 13 sex boy is ss

Process finished with exit code 0

a= 'i am %s, she is %d'%('xm',123)
print(a)

i am xm, she is 123

Process finished with exit code 0

a= 'abc %.2f'%99.45678           # .2表示保留小数点后2位（四舍五入）
print(a)

abc 99.46

Process finished with exit code 0

a= 'abc %.2f %%'%99.45678
print(a)

abc 99.46 %

Process finished with exit code 0

a= "i am %(name)s ,and age is %(age)d" % {"name":"ljj","age":18}
print(a)

i am ljj ,and age is 18

Process finished with exit code 0

a= "i am %(name)-60s aabbcc" % {"name":"ljj"}    #左对齐60格（+右对齐）
print(a)

i am ljj                                                          aabbcc

Process finished with exit code 0

a= "i am {},age {},{}" .format("xm",18,123)
print(a)

i am xm,age 18,123

Process finished with exit code 0

a= "i am {1},age {0}" .format("xm",18,123)
print(a)

i am 18,age xm

Process finished with exit code 0

a= "i am {name},age {age} " .format(name="xm",age=18)
print(a)

i am xm,age 18 

Process finished with exit code 0