如何在txt文件中找到单词

Question

我正在使用micropython，我想在我的txt文件中找到essid和密码，然后更改我的wifi配置。

和我的setting.text

“ \ n -----------时间----------- \ nt =（2019,5,23,4,40,00,4,143）\ n- ---------- Wifi ----------- \ n w_e = any-wifi-name \ n w_p = any-wifi-password \ n -------- --Wifi_new ---------- \ n w_n_e = wifi_name \ n w_n_p = wifi_password \ n --------- Nodemcu_wifi --------- \ n n_e = KENOK KENOK \ n n_p = 123456789000 \ n -----------结束----------- \ n“

---

-----------时间-----------

t =（2019,5,23,4,40,00,4,143）

----------- Wifi -----------

w_e = any-wifi-nam

w_p = any-wifi-password

----------- Wifi_new -----------

w_n_e = wifi_name

w_n_p = wifi_password

----------- Nodemcu_wifi -----------

n_e = KENOK KENOK

n_p = 123456789000

-----------结束-----------

我想找到w_e = **********。只有星号（任何wifi ESSID）没有w_e =。如何找到？ 我的代码不起作用。如何解决？

def wifi_connect():
file = open("setting.text" , "r")
wifi_essid =re.sub(r'[w_e=]+.+\n$'," ",file.read())
print(wifi_essid)
...
...
...
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True) 
sta_if.connect(wifi_essid,wifi_password)
return

Answer 1

不使用正则表达式-遍历文件；找到以'w_e='开头的行；用切片从该行提取essid。

with open("setting.text" , "r") as f:
    for line in f:
        if line.startswith('w_e='):
            line = line.strip()
            essid = line[4:]
            print(essid)
            break

使用r'w_e=(.*)$'作为正则表达式模式：

pattern = r'w_e=(.*)$'

with open("setting.text" , "r") as f:
    text = f.read()
m = re.search(pattern, text, flags=re.M)
if m:
    print(m.group(1))
else:
    print('no match!')