format格式化字串
1.按序傳入引數
實際上format（）裡面的會包裝成為乙個元組，若「」裡面的{}裡沒有具體的引數，則按照順序填入
print("
my name is {}, my age is {}, my hobby is {}
".format("
alex
", 18, "
pingpangball
"))
結果：my name isalex, my age is 18, my hobby is pingpangball
2.按照{}裡面的引數傳入
print("
my name is , my age is , my hobby is
".format("
alex
", 18, "
pingpangball"))
print("
my name is , my age is , my hobby is
".format("
alex
", 18, "
pingpangball"))
print("
my name is , my age is , my hobby is
".format("
alex
", 18, "
pingpangball
"))
結果：my name is alex, my age is 18, my hobby ispingpangball
my name is pingpangball, my age is 18, my hobby isalex
my name is 18, my age is alex, my hobby ispingpangball
3.按照鍵值對來將值傳入
print("
my name is , my age is , my hobby is
".format(name = "
alex
", age = 18, hobby = "
pingpangball"))
print("
my name is , my age is , my hobby is
".format(age = 18, hobby = "
pingpangball
", name = "
alex
"))
結果：my name is alex, my age is 18, my hobby ispingpangball
my name is alex, my age is 18, my hobby ispingpangball
4.指定傳入的值的資料型別
print("
s1 = , s2 = , s3 = , s4 = , s5 = , s6 =
".format(12, 13, 14, 15, 16, 17))
結果：s1 = 12, s2 = 13.000000, s3 = 1110, s4 = 1.500000e+01, s5 = 20, s6 = 11
5.多括號的情形
print("
my name is
".format("
alex"))
print("
my name is }
".format("
alex"))
print("
my name is }}
".format("
alex"))
print("
my name is }}}
".format("
alex"))
print("
my name is }}}}
".format("
alex
"))
結果：my name is alex
my name is
my name is
my name is }
my name is }
分析：由於}可以轉義為{}，因此導致上述結果，也能直接看出來format（）裡面的引數不一定會傳給前方字串中
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