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To convert a list of lists to csv in python, we can use the csv. writer() method along with the csv. writerow() method.
The most common method to write data from a list to CSV file is the writerow() method of writer and DictWriter class. Example 1: Creating a CSV file and writing data row-wise into it using writer class.
Change writer.writerow(data) to writer.writerow([data]).
.writerow takes an iterable and uses each element of that iterable for each column. If you use a list with only one element it will be placed in a single column.
You should also restructure your loop:
for word in header:
writer.writerow([word])
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