NumPy 字符串函数

import numpy as np 

print ('连接两个字符串：')
print (np.char.add(['hello'],[' xyz']))
print ('\n')

print ('连接示例：')
print (np.char.add(['hello', 'hi'],[' abc', ' xyz']))

连接两个字符串：
['hello xyz']

连接示例：
['hello abc' 'hi xyz']

import numpy as np

print (np.char.multiply('geek-docs ',3))

geek-docs geek-docs geek-docs

import numpy as np

# np.char.center(str , width,fillchar) ：
# str: 字符串，width: 长度，fillchar: 填充字符
print (np.char.center('geek-docs', 20,fillchar = '*'))

*****geek-docs******

import numpy as np

print(np.char.capitalize('geek-docs'))

Geek-docs

import numpy as np

print(np.char.title('i like geek-docs'))

I Like Geek-Docs

import numpy as np

# 操作数组
print(np.char.lower(['GEEK-DOCS', 'GOOGLE']))

# 操作字符串
print(np.char.lower('GEEK-DOCS'))

['geek-docs' 'google']
geek-docs

import numpy as np

# 操作数组
print(np.char.upper(['geek-docs', 'google']))

# 操作字符串
print(np.char.upper('geek-docs'))

['GEEK-DOCS' 'GOOGLE']
GEEK-DOCS

import numpy as np

# 分隔符默认为空格
print(np.char.split('i like geek-docs?'))
# 分隔符为 .
print(np.char.split('www.geek-docs.com', sep='.'))

['i', 'like', 'geek-docs?']
['www', 'geek-docs', 'com']

import numpy as np

# 换行符 \n
print(np.char.splitlines('i\nlike geek-docs?'))
print(np.char.splitlines('i\rlike geek-docs?'))

['i', 'like geek-docs?']
['i', 'like geek-docs?']

import numpy as np

# 移除字符串头尾的 a 字符
print(np.char.strip('ashok ageek-docsa', 'a'))

# 移除数组元素头尾的 a 字符
print(np.char.strip(['ageek-docsa', 'admin', 'java'], 'a'))

shok ageek-docs
['geek-docs' 'dmin' 'jav']

import numpy as np

# 操作字符串
print(np.char.join(':', 'geek-docs'))

# 指定多个分隔符操作数组元素
print(np.char.join([':', '-'], ['geek-docs', 'google']))

g:e:e:k:-:d:o:c:s
['g:e:e:k:-:d:o:c:s' 'g-o-o-g-l-e']

import numpy as np

print(np.char.replace('i like geek-docs', 'oo', 'cc'))

i like geek-docs

import numpy as np

a = np.char.encode('geek-docs', 'cp500')
print(a)

b'\x87\x85\x85\x92`\x84\x96\x83\xa2'

import numpy as np

a = np.char.encode('geek-docs', 'cp500')
print(a)
print(np.char.decode(a, 'cp500'))

b'\x87\x85\x85\x92`\x84\x96\x83\xa2'
geek-docs