报错“ValueError: invalid \x escape”。

本文介绍了一种常见的Python Selenium库使用过程中遇到的ValueError: invalid x escape错误,并给出了具体的解决办法。该问题通常发生在使用CSS选择器进行元素定位时。

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在运行下面Python代码时报错“ValueError: invalid \x escape“

'''css元素定位'''
from selenium import webdriver  
      
driver = webdriver.Chrome() 

driver.get("C:\Python27\example\ss\xml2.html" )

driver.find_element_by_css_selector('css=ul>li:nth(0)')
print driver.getvalue()

driver.quit()


解决方法:因为\x在Python中会认为是16进制数据。 所以尽量还是在路径中使用 \\或者在字符串前加r

c:\Users\�����\Desktop\attention\main.py:312: SyntaxWarning: invalid escape sequence '\G' mat_file = "F:\Grade2\attention\2348892\subject_02.mat" ���������з�������: �޷�����MAT�ļ�: [Errno 22] Invalid argument: 'F:\\Grade2\x07ttention\x9c8892\\subject_02.mat' Traceback (most recent call last): File "C:\Users\�����\AppData\Roaming\Python\Python312\site-packages\scipy\io\matlab\_mio.py", line 39, in _open_file return open(file_like, mode), True ^^^^^^^^^^^^^^^^^^^^^ OSError: [Errno 22] Invalid argument: 'F:\\Grade2\x07ttention\x9c8892\\subject_02.mat' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "c:\Users\�����\Desktop\attention\main.py", line 26, in safe_loadmat return scipy.io.loadmat(file_path) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\�����\AppData\Roaming\Python\Python312\site-packages\scipy\io\matlab\_mio.py", line 233, in loadmat with _open_file_context(file_name, appendmat) as f: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\Anaconda\Lib\contextlib.py", line 137, in __enter__ return next(self.gen) ^^^^^^^^^^^^^^ File "C:\Users\�����\AppData\Roaming\Python\Python312\site-packages\scipy\io\matlab\_mio.py", line 17, in _open_file_context f, opened = _open_file(file_like, appendmat, mode) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\�����\AppData\Roaming\Python\Python312\site-packages\scipy\io\matlab\_mio.py", line 45, in _open_file return open(file_like, mode), True ^^^^^^^^^^^^^^^^^^^^^ OSError: [Errno 22] Invalid argument: 'F:\\Grade2\x07ttention\x9c8892\\subject_02.mat' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "c:\Users\�����\Desktop\attention\main.py", line 316, in <module> fig, results_df = process_alpha_eeg_data(mat_file) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "c:\Users\�����\Desktop\attention\main.py", line 35, in process_alpha_eeg_data mat_data = safe_loadmat(mat_file_path) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "c:\Users\�����\Desktop\attention\main.py", line 33, in safe_loadmat raise ValueError(f"�޷�����MAT�ļ�: {str(e)}") ValueError: �޷�����MAT�ļ�: [Errno 22] Invalid argument: 'F:\\Grade2\x07ttention\x9c8892\\subject_02.mat'分析以上报错原因
06-26
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