python入门 第十三天 字符串格式化

# %[(name)][flags][width].[precision]typecode
s = "i am %s, age %d" % ('xinmin', 18)
print(s) # i am xinmin, age 18
# []括起来的表示可选参数，%s,%d等都是typecode
s1 = "i am %(n1)s, age %(n2)d" % {"n1": 'xinmin', "n2": 19}
print(s1) # i am xinmin, age 19
s2 = "i am %s, age %.2f" % ('xinmin', 18)
print(s2) #  i am xinmin, age 18.00

%常用格式化

s = "i am {:b}adcd".format(12)
print(s) # i am 1100adcd
s2 = "i am {:.2%}asw".format(0.2)
print(s2) # i am 20.00%asw

常用格式化