python学习第一天

字符串

1、单引号、双引号都可。

name = "jiangpanke"   print(name) //jiangpank
name = "jiang'pan'ke" print(name) //jiang'pan'ke
name = "jiangpan'ke" print(name) //jiangpan'ke
name = "jiang"panke" print(name) //Error
name = "jiang"pan"ke" print(name) //Error
name = "jiang\"pan\\'ke" print(name) //jiang"pan\'ke

2、修改变量大小写

title()、lower()、upper()
name = "jiangpanke"
print(name.title())   // JiangPanKe
print(name.lower())   // jiangpanke
print(name.upper())   // JIANGPANKE

3、添加空白

\t \n

4、删除字符串空白

strip.()、rstrip()、lstrip()
name = "'  jiangpanke  '"
print(name.title().strip.())   //'jiangpanke'
print(name.lower().lstrip())  // 'jiangpanke   '
print(name.upper().rstrip())  //' jiangpanke'

清洗字符串：name = name.strip()

5、在字符串中使用变量

f字符串：format的缩写，用于py3.6以上
name = "jiangpanke  "
full_name = f"{name.rstrip()}!"
print(f"Hello,{full_name.title()})  //  Hello,JiangPanKe!