How to load CSV file in Jupyter Notebook?

问题

I'm new and studying machine learning. I stumble upon a tutorial I found online and I'd like to make the program work so I'll get a better understanding. However, I'm getting problems about loading the CSV File into the Jupyter Notebook.

I get this error:

File "<ipython-input-2-70e07fb5b537>", line 2
    student_data = pd.read_csv("C:\Users\xxxx\Desktop\student-intervention- 
system\student-data.csv")
                          ^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in 
position 2-3: truncated \UXXXXXXXX escape

and here is the code:

I followed tutorials online regarding this error but none worked. Does anyone know how to fix it?

3rd attempt with r"path"

I've tried also "\" and utf-8 but none worked.

I'm using the latest version of Anaconda Windows 7 Python 3.7

回答1:

Use raw string notation for your Windows path. In python '\' have meaning in python. Try instead do string like this r"path":

student_data = pd.read_csv(r"C:\Users\xxxx\Desktop\student-intervention- system\student-data.csv")

If it doesnt work try this way:

import os

path = os.path.join('c:' + os.sep, 'Users', 'xxxx', 'Desktop', 'student-intervention-system', 'student-data.csv')
student_data = pd.read_csv(path)

回答2:

Either replace all backslashes \ with frontslashes / or place a r before your filepath string to avoid this error. It is not a matter of your folder name being too long.

---

As Bohun Mielecki mentioned, the \ character which is typically used to denote file structure in Windows has a different function when written within a string.

From Python3 Documentation: The backslash \ character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character.

How this particularly affects your statement is that in the line

student_data = pd.read_csv("C:\Users\xxxx\Desktop\student-intervention- 
system\student-data.csv")

\Users matches the escape sequence \Uxxxxxxxx whereby xxxxxxxx refers to a Character with 32-bit hex value xxxxxxxx. Because of this, Python tries to find a 32-bit hex value. However as the -sers from Users doesn't match the xxxxxxxx format, you get the error:

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

---

The reason why your code works now is that you have placed a r in front of 'C:\Users\xxxx\Desktop\project\student-data.csv'. This tells python not to process the backslash character / as it usually does and read the whole string as-is.

I hope this helps you better understand your problem. If you need any more clarification, do let me know.

Source: Python 3 Documentation

回答3:

Try

pd.read_csv('file_name',encoding = "utf-8")

回答4:

I found the problem. The problem is my folder name that is really long. I changed my folder name into "project" and the data is now finally loaded! Silly!

回答5:

Try this student_data = pd.read_csv("C:/Users/xxxx/Desktop/student-intervention- system/student-data.csv").

Replacing backslashes in that code it will work for you.

来源：https://stackoverflow.com/questions/55209661/how-to-load-csv-file-in-jupyter-notebook