Python numpy.find()
numpy.core.defchararray.find(arr, substring, start=0, end=None) :查找指定范围内的子字符串的最低索引。
参数:
arr :要搜索的数组类或字符串。
substring :要搜索的子串。
start,end。[int, optional] 要搜索的范围。
返回值 :
一个整数数组,包含找到的子串的最低索引。
代码 #1:
# Python Program illustrating
# numpy.char.find() method
import numpy as np
arr = ['vdsdsttetteteAAAa', 'AAAAAAAaattttds', 'AAaaxxxxtt', 'AAaaXDSDdscz']
print ("arr : ", arr)
print ("\nfind of 'tt'", np.char.find(arr, 'tt'))
print ("find of 'tt'", np.char.find(arr, 'tt', start = 0))
print ("find of 'tt'", np.char.find(arr, 'tt', start = 8))
输出:
arr : ['vdsdsttetteteAAAa', 'AAAAAAAaattttds', 'AAaaxxxxtt', 'AAaaXDSDdscz']
find of 'tt' [ 5 9 8 -1]
find of 'tt' [ 5 9 8 -1]
find of 'tt' [ 8 9 8 -1]
代码 #2:
# Python Program illustrating
# numpy.char.find() method
import numpy as np
arr = ['vdsdsttetteteAAAa', 'AAAAAAAaattttds', 'AAaaxxxxtt', 'AAaaXDSDdscz']
print ("\nfind of 'Aa'", np.char.find(arr, 'Aa'))
print ("find of 'Aa'", np.char.find(arr, 'Aa', start = 8))
输出:
find of 'Aa' [15 6 1 1]
find of 'Aa' [15 -1 -1 -1]