python 字符串
str, ‘’, ‘’ ‘’, ‘’’ ‘’’;
python没有字符,只有字符串hh
切片
字符串不可以修改,修改的话,类似于tuple,
修改的话, 只可以整体修改
tuple 也是可这样,
确切的说只是修改了指针的指向
内容就是相当于我们之前的字符串常量, 不可以别修改, 只是可以改你指向的方向
函数请看转载
https://blog.csdn.net/marvin_wind/article/details/79903175
格式化字符串format
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简单应用
“{} love {} {} much{}!”.format(“I”, “you”, “very”, ‘!’)
“{0} love {1} {2} much{3}!”.format(“I”, “you”, “very”, ‘!’) ///0 1 2 是位置参数
“{a} love {b} {c} much{d}!”.format(a = “I”, b = “you”, c = “very”, d = ‘!’)
输出
‘I love you very much!!’
“{3} love {2} {1} much{0}!”.format(“I”, “you”, “very”, ‘!’)
输出
‘! love very you muchI!’
“{{}}”.format(“1”)
输出
‘{}’ #用于打印花括号,类似于我们之前的转义字符
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格式化输出
print("{} + {} = {}".format(1, 2, 1 + 2));
print("{:0.1f}{}".format(14.551, ‘GB’));
print("%c %c %c" % (97, 98, 99)) print("%d + %d = %d" % (1, 2, 1+2)) print("%o + %o = %o" % (9, 1, 1+9)) print("%x + %x = %X" % (10, 1, 1+10)) print("%f" % (14.332)) print("%e" % (14.332)) print("%E" % (14.332))
# 后面内容修改一点, 在八进制加上 0o, 十六进制 0X或0x
代码:
print("{a:04.1f} + {b:04.1f} = {c:06d}".format(a = 1, b = 2, c = 1+ 2 ))
输出
01.0 + 02.0 = 000003