【发布时间】:2020-01-22 06:23:37
【问题描述】:
如何用我已经完成的循环次数来改变字符串的某个部分?
我正在使用 Chromedriver (find_element_by_xpath) 从网站上抓取数据。我看到当 for 循环计数超过 10 时会出现问题。 在 count 达到 10 之前,它已经能够将 /tr[1] 替换为 /tr[2] 等等,但是一旦出现两位数,事情就会变得复杂。
count = 0
for i in range(0, 21):
count += 1
string[65] = str(count)
string = ''.join(string)
print(string)
string = list(string)
The output is:
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[1]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[2]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[3]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[4]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[5]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[6]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[7]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[8]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[9]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[10]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[110]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[1210]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[13210]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[143210]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[1543210]/td[2]
And what I expect output to be is:
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[1]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[2]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[3]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[4]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[5]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[6]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[7]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[8]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[9]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[10]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[11]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[12]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[13]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[14]/td[2]
//*[@id='teams_wrapper']/div[2]/div[3]/div[2]/div/table/tbody/tr[15]/td[2]
【问题讨论】:
标签: python string for-loop xpath