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We can also write to files using the open function.

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We will use Python's open function to get a file object to create a text file.

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We can apply method write to write data to that file.

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As a result, text will be written to the file.

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We can create the file Example2.txt as follows.

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We use the open function.

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The first argument is the file path.

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This is made up of the file name.

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If you have that file in your directory,

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it will be overwritten, and the file directory.

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We set the mode parameter to W for writing.

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Finally, we have the file object.

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As before we use the with statement.

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The code will run everything in the indent block then close the file.

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We create the file object, File1.

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We use the open function.

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This creates a file Example2.txt in your directory.

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We use the method write,

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to write data into the file.

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The argument is the text we would like input into the file.

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If we use the write method successively,

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each time it is called, it will write to the file.

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The first time it is called, we will write,

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"This is line A
" to represent a new line.

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The second time we call the method, it will write,

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"this is line B
" then it will close the file.

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We can write each element in a list to a file.

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As before, we use a with command and the open function to create a file.

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The list, Lines, has three elements consisting of text.

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We use a for loop to read each element of

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the first lines and pass it to the variable line.

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The first iteration of the loop writes

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the first element of the list to the file Example2.

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The second iteration writes the second element of the list and so on.

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At the end of the loop, the file will be closed.

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We can set the mode to appended using a lowercase a.

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This will not create a new file but just use the existing file.

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If we call the method write,

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it will just write to the existing file,

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then add "This is line C" then close the file.

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We can copy one file to a new file as follows.

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First, we read the file Example1 and interact with it via the file object, read file.

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Then we create a new file Example3 and

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use the file object write file to interact with it.

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The for loop takes a line from the file object, read file,

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and stores it in the file Example3 using the file object, write file.

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The first iteration copies the first line.

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The second iteration copies the second line,

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till the end of the file is reached.

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Then both files are closed.

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Check out the labs for more examples.

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(Music)