Python-函數-字元串函數

函數
1.字元串函數

#(1)add() 對兩個數組的元素進行字元串連接
import numpy as np
print(np.char.add(["xiaodu"],["good"]))
print(np.char.add(["xiaodu","dudu"],["good","nice"])) 

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

#(2)multiply() 返回按元素多重連接後的字元串
import numpy as np
print(np.char.multiply("good",3))

#output：goodgoodgood

#(3)center() 將字元串居中，並使用指定字元在左側和右側進行填充
import numpy as np
print(np.char.center(["nice","good"],12,fillchar="*"))

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

#(4)capitalize() 將字元串的第一個字母轉換為大寫
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() 將字元串的每個單詞的第一個字母轉換為大寫
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() 數組元素轉換為小寫
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() 數組元素轉換為大寫
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() 指定分隔符對字元串進行分割，並返回數組列表
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，以換行符分割
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() 移除元素開頭或者結尾處的特定字元
import numpy as np
print(np.char.strip(["**nice***","*day"],"*"))

#output: ['nice' 'day']

#(11)join() 通過指定分隔符來連接數組中的元素
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() 使用新字元串替換字元串中的所有子字元串
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() 編碼，數組元素依次調用str.encode
import numpy as np print(np.char.encode(["nice","good"],"utf-8"))

#(14)decode() 解碼，數組元素依次調用str.decode
import numpy as np
a = np.char.encode(["nice","good"],"utf-8")
print(np.char.decode(a,"utf-8"))

#output: ['nice' 'good']