python十二:字符串格式化

# python的字符串格式化有两种: 百分号方式,format方式 s = "Hello %s, Hello %s" % ("world", "python") print(s)s = "Hello %s, Hello %s, python is %d years" % ("world", "python", 27) print(s)# 打印浮点数 tp1 = "float %f" % 10.987654621 print(tp1) # 打印百分比 tp1 = "float %.2f%%" % 10.987654621 print(tp1)# 通过字典 s = "Hello %(name)s, python is %(age)d years" % {"name": "world", "age": 27} print(s) tp = "three country, liu{}, guan{}, zhang{}".format("bei","yu","fei") print(tp)# 通过索引,取值 tp = "three country, liu{2}, guan{0}, zhang{1}".format("bei","yu","fei") print(tp)# 通过字典方式一 tp = "three country, liu{name1}, guan{name2}, zhang{name3}".format(name1="bei",name2="yu",name3="fei") print(tp)# 通过字典方式二（传递字典,要加上**） tp = "three country, liu{name1}, guan{name2}, zhang{name3}".format(**{"name1":"yu","name2":"fei","name3":"bei"}) print(tp)# 通过索引,取值 tp = "three country, liu{1[0]}, guan{1[1]}, zhang{1[2]}".format(["a","b","c"],["ab","cd","ef"]) print(tp)tp = "three country, liu{:s}, {:d}国, {:.2f}年".format("bei", 3, 279.987654) print(tp)# format()传递列表,要加上* tp = "three country, guan{:s}, {:d}国, {:.2f}年".format(*["yu", 3, 280.987654]) print(tp) tp = "three country, guan{name:s}, {country:d}国, {age:.2f}年".format(name="yu",country=3,age=279.7655432) print(tp)# number b:二进制 o:八进制 d:十进制 x:小写的十六进制 X:大写的十六进制 tp = "number: {:b}, {:o}, {:d}, {:x}, {:X}, {:%}".format(15, 15, 15, 15, 15, 0.15987654321) print(tp)

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