numpy.core.defchararray.find(arr, substring, start=0, end=None)：查找指定範圍內子字符串的最低索引。
參數:
arr : array-like or string to be searched.
substring : substring to search for.
start, end: [int, optional] Range to search in.返回: An integer array with the lowest index of found sub-string.
代碼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))輸出：
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]
代碼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))輸出：
find of 'Aa' [15 6 1 1] find of 'Aa' [15 -1 -1 -1]
相關用法
注：本文由純淨天空篩選整理自Mohit Gupta_OMG 大神的英文原創作品 numpy.find() in Python。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。