Python DataFrame to CSV

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In this Python tutorial, we will learn how to convert Python DataFrame to CSV. Also, we will cover these topics.

  • Python DataFrame to CSV File
  • Python DataFrame to CSV without Header
  • Python DataFrame to CSV Column Order
  • Python DataFrame to CSV Append
  • Python DataFrame to CSV without Index
  • Python DataFrame to CSV Buffer
  • Python DataFrame to CSV Example
  • Python DataFrame to CSV String
  • Python DataFrame to CSV Create Folder
  • Python DataFrame to CSV Encoding

Python DataFrame to CSV File

In this section, we will learn about how to convert Python DataFrame to CSV files.

  • A CSV (comma-seperated value) are the text files that allows data to be stored in a table format.
  • Using .to_csv() method in Python Pandas we can convert DataFrame to CSV file.
  • In our example, we have used ElectricCarData_Norm dataset that we have downloaded from kaggle.
  • We have recreated a dataframe with less columns and then using .to_csv() method we have exported the dataframe to CSV file.

Read: Get index Pandas Python

Python DataFrame to CSV without Header

In this section, we will learn how to convert Python DataFrame to CSV without a header.

  • While exporting dataset at times we are exporting more dataset into an exisiting file. At that time, file already have header so we remove the header from current file.
  • Using header=False inside the .to_csv() method we can remove the header from a exported file.
  • After removing the header, the first row of the dataset takes place of header.
  • Here is the implemenation on Jupyter Notebook.

Read: Python Pandas Write DataFrame to Excel

Python DataFrame to CSV Column Order

In this section, we will learn about how to convert Python DataFrame to CSV columns without changing the order.

  • Column sequence is not affected by the export to CSV file in Python Pandas.
  • But if you want to change it manually than that could be done simply by passing the list of columns inside the .to_csv() method.
  • Columns in whatever sequence will be passed will become the column sequence for new file.
  • In the below example, we have made some changes in the sequence of columns.
dataframe.to_csv('files/newexport.csv', columns=['Seats', 'TopSpeed', 'Brand'], index=False)

Read: Count Rows in Pandas DataFrame

Python DataFrame to CSV Append

In this section, we will learn how to convert Python DataFrame to CSV while appending the data.

  • Append means adding more new data to an exisiting data in Python Pandas.
  • Using mode=’a’ inside the .to_csv() method we can change the file mode to append mode.
  • That means any data exported to this file will be added to the current file instead of overwriting the data.
  • here is how you can implement append in Python Pandas.
df.to_csv('newfile.csv', mode='a', index=False)

Read: Python Pandas DataFrame Iterrows

Python DataFrame to CSV without Index

In this section, we will learn how to convert Python DataFrame to CSV without Index.

  • Everytime the dataframe is exported to CSV file an index number is automatically exported.
  • These indexes keep on creating on every export. So they are adding up unnecessary data to the file.
  • Using index=False we can avoid autoformation of index in a newly exported file.
  • Here is the implementation on Jupyter Notebook.

Read: Python convert DataFrame to list

Python DataFrame to CSV Buffer

In this section, we will learn about Python DataFrame to CSV Buffer.

  • When data is stored in a computer memory for later use than that is called buffer.
  • Using IO module in Python we can use String Buffer to store the information on the machine. Later this information is exported to CSV.
  • Here is the implementation of Python DataFrame to CSV Buffer.

Read: Pandas Delete Column

Python DataFrame to CSV Example

In this section, we will demonstrate an example of how t convert Python DataFrame to CSV.

  • This is a simple example where in we are going to export the dataframe to CSV using Python Pandas.

Read: Python Pandas Drop Rows

Python DataFrame to CSV String

In this section, we will learn about Python DataFrame to CSV String. Here String means buffer string.

  • When data is stored in a computer memory for later use than that is called buffer.
  • Using IO module in Python we can use String Buffer to store the information on the machine. Later this information is exported to CSV.
  • Here is the implementation of Python DataFrame to CSV Buffer.

Read: How to Convert Pandas DataFrame to a Dictionary

Python DataFrame to CSV Create Folder

In this section, we will learn how to convert Python DataFrame to CSV in a specific folder.

  • When we export file than at times we want to store it in a specific folder to keep things organized.
  • So in this section, we will see how to create a specific folder and store the csv inside it. In case the folder already exist then file will be saved inside it.
  • Using OS module in Python we can interact with the folders of the computer also we can create one if required.
  • In the below code, we have saved the csv file inside the files folder on the system. Incase files folder is unavailable then it will be created automatically.
import os

fname = 'ElectricCarData_Norm.csv'

directory = './files'
if not os.path.exists(directory):
    os.mkdir(directory)

path = os.path.join(directory, fname)    

df.to_csv(path)

Read: How to use Pandas drop() function in Python

Python DataFrame to CSV Encoding

In this section, we will learn about Python DataFrame to CSV Encoding.

  • Encoding refers to converting the text into another form that is accepatable for a particular program.
  • For Python and many other text edittors support UTF-8 as their encoding. These requirements change after a very long period of time.
  • But in some cases where programmer works for sophisticated system then there he may have to follow the specific encoding.
  • The encoding can be changed by using the keyword encoding followed by the format. And all of this will be writted inside the .to_csv() method. 
dataframe.to_csv('files/file.csv',encoding='utf-8-sig')

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In this tutorial, we have learned how to convert Pandas DataFrame to a CSV file. Also, we have covered these topics.

  • Python DataFrame to CSV File
  • Python DataFrame to CSV without Header
  • Python DataFrame to CSV Column Order
  • Python DataFrame to CSV Append
  • Python DataFrame to CSV without Index
  • Python DataFrame to CSV Buffer
  • Python DataFrame to CSV Example
  • Python DataFrame to CSV String
  • Python DataFrame to CSV Create Folder
  • Python DataFrame to CSV Encoding