Python-函数-字符串函数

函数
1.字符串函数

#(1)add() 对两个数组的元素进行字符串连接
import numpy as np
print(np.char.add(["xiaodu"],["good"]))
print(np.char.add(["xiaodu","dudu"],["good","nice"])) 

#output：['xiaodugood'] ['xiaodugood' 'dudunice'] 

#(2)multiply() 返回按元素多重连接后的字符串
import numpy as np
print(np.char.multiply("good",3))

#output：goodgoodgood

#(3)center() 将字符串居中，并使用指定字符在左侧和右侧进行填充
import numpy as np
print(np.char.center(["nice","good"],12,fillchar="*"))

#output：['****nice****' '****good****']

#(4)capitalize() 将字符串的第一个字母转换为大写
import numpy as np
print(np.char.capitalize(["what a nice day today","i have a good time"]))

#output:['What a nice day today' 'I have a good time']

#(5)title() 将字符串的每个单词的第一个字母转换为大写
import numpy as np
print(np.char.title(["what a nice day today","i have a good time"]))

#output: ['What A Nice Day Today' 'I Have A Good Time']

#(6)lower() 数组元素转换为小写
import numpy as np
print(np.char.lower(["what a nice Day today","i HAVE a good time"]))

#Output:['what a nice day today' 'i have a good time']

#7)upper() 数组元素转换为大写
import numpy as np
print(np.char.upper(["what a nice Day today","i HAVE a good time"]))

#Output: ['WHAT A NICE DAY TODAY' 'I HAVE A GOOD TIME']

#(8)split() 指定分隔符对字符串进行分割，并返回数组列表
import numpy as np
print(np.char.split(["what a nice day today","i have a good time"],sep=" "))

#Output: [list(['what', 'a', 'nice', 'day', 'today'])
 list(['i', 'have', 'a', 'good', 'time'])]

#(9)splitlines() 返回元素中的行列表，以换行符分割
import numpy as np
print(np.char.splitlines(["what a nice\nday today","i have a good\ntime"]))

#output: [list(['what a nice', 'day today']) list(['i have a good', 'time'])]

#(10)strip() 移除元素开头或者结尾处的特定字符
import numpy as np
print(np.char.strip(["**nice***","*day"],"*"))

#output: ['nice' 'day']

#(11)join() 通过指定分隔符来连接数组中的元素
import numpy as np
print(np.char.join("-",["nice","day"]))
print(np.char.join(["-",":"],["nice","day"]))

#output: ['n-i-c-e' 'd-a-y']
['n-i-c-e' 'd:a:y']

#(12)replace() 使用新字符串替换字符串中的所有子字符串
import numpy as np
print(np.char.replace(["what a good day today","i have a good time"],"good","nice"))

#output: ['what a nice day today' 'i have a nice time']

#(13)encode() 编码，数组元素依次调用str.encode
import numpy as np print(np.char.encode(["nice","good"],"utf-8"))

#(14)decode() 解码，数组元素依次调用str.decode
import numpy as np
a = np.char.encode(["nice","good"],"utf-8")
print(np.char.decode(a,"utf-8"))

#output: ['nice' 'good']