Module 'csv' has no attribute 'writer' in Python

Module 'csv' has no attribute 'writer' in Python #

The Python "AttributeError module 'csv' has no attribute 'writer'" occurs when we have a local file named csv.py and try to import from the csv module. To solve the error, make sure to rename any local files named csv.py.

Here is an example of how the error occurs in a file called csv.py.

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import csv

with open('example.csv', 'w', newline='') as csvfile:
    # ⛔️ AttributeError: module 'csv' has no attribute 'writer'
    csv_writer = csv.writer(csvfile, delimiter=',',
                            quoting=csv.QUOTE_MINIMAL)
    csv_writer.writerow(['Alice', 'Bob', 'Carl'])

The most likely cause of the error is having a local file named csv.py which shadows the csv module from the standard library.

Make sure to rename your local file to something other than csv.py to solve the error.

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import csv

with open('example.csv', 'w', newline='') as csvfile:
    # ✅ Works
    csv_writer = csv.writer(csvfile, delimiter=',',
                            quoting=csv.QUOTE_MINIMAL)
    csv_writer.writerow(['Alice', 'Bob', 'Carl'])

You can access the __file__ property on the imported module to see whether it is shadowed by a local file.

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import csv

print(csv.__file__)


# ⛔️ result if shadowed by local file
# /home/borislav/Desktop/bobbyhadz_python/csv.py

# ✅ result if pulling in correct module
# /usr/lib/python3.10/csv.py

A good way to start debugging is to print(dir(your_module)) and see what attributes the imported module has.

Here is what printing the attributes of the csv module looks like when I have a file csv.py in the same directory.

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import csv

# ⛔️ ['__builtins__', '__cached__', '__doc__', '__file__',
#  '__loader__', '__name__', '__package__', '__spec__']
print(dir(csv))

If you pass a module object to the dir() function, it returns a list of names of the module's attributes.

We can see that the imported csv module doesn't have a writer attribute, which makes it evident that we are shadowing the official csv module with our local csv.py file.

If you try to import the csv module in a file called csv.py, you would get a little different error message that means the same thing.

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import csv


with open('example.csv', 'w', newline='') as csvfile:
    # ⛔️ AttributeError: partially initialized module 'csv' has no attribute 'writer' (most likely due to a circular import)
    csv_writer = csv.writer(csvfile, delimiter=',',
                            quoting=csv.QUOTE_MINIMAL)
    csv_writer.writerow(['Alice', 'Bob', 'Carl'])

Renaming your file solves the error.

You can use the sys module to print all of the built-in module names if you ever wonder if your local modules are clashing with built-in ones.

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import sys

# 👇️ print all built-in module names
print(sys.builtin_module_names)