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Mar 11, 2018 · 0. In crude terms, truncate is about removal of the text from your file starting from the current position until the end of the file. Assume a file has 5 lines: file.readline() # reads the first line. file.truncate() # removes the lines 2 through 5. file.readline() # returns '' since lines have been deleted.
- Use The Int Function to Truncate A Float in Python
- Use The Math Library to Truncate A Float in Python
- Use String Methods to Truncate A Float in Python
- Use f-strings to Truncate A Float in Python
- Truncate A List of Floats in Python Using A For Loop
- Truncate A List of Floats in Python Using A List Comprehension
- Conclusion
The built-in int()function takes a float and converts it to an integer, thereby truncating a float value by removing its decimal places. The int() function works differently than the round() and floor() function (which you can learn more about here). The function only removes anything following the decimal, regardless of what follows it. This is di...
Similar to the int() function, the math library has a library that can be helpful to truncate a float in Python, the trunc()function. While it may seem trivial to use another library to do this, it can help your code read a little clearer to explain what the function is doing and why it’s doing it. Because our intention is to truncate a float, the ...
We can also use string methods to truncate a float in Python. This works by first converting a float to string and then manipulating the string. Using the str.split() method, we can split a string at a period and keep only the first section of the split. You can learn more about splitting strings in this tutorial. Let’s see how we can truncate a fl...
There may be times that you want to truncate a float to a certain number of decimal points. This can be helpful, say, when displaying currencies or percentages. For this, we can easily use string formatting by way of the helpful f-string featuresin Python. With this, we can specify the number of decimal points to keep and convert the string back to...
There may be times when you are given a list of floats and need truncate all of them. One of the ways in which you can do this is by using a Python for loop. When doing this, we can loop over each item in the list, truncate it, and add it to a new list. Let’s see what this looks like in Python: What we’ve done here is: 1. Instantiated a new, empty ...
The above section showed how to use a Python for loop to truncate a list of floats. We can also use a Python list comprehensionto do this, thereby saving us some visual clutter and the need to instantiate an empty list first. Let’s see how we can use a list comprehension to accomplish this: To learn more about Python list comprehensions, check out ...
In this tutorial, you learned how to use Python to truncate a float. You learned how to do this using the int() function, the mathlibrary, and string methods. You also learned how to use for loops and list comprehensions to truncate a list of floating point values in Python. To learn more about the math.trunc() function, check out the official docu...
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Jul 22, 2016 · If you really want to truncate the original list, just delete the elements you don't want by using slicing with del ... python; list; or ask your own question.
The truncate() method in Python is a file method used to resize the file to a specified size. If the optional size parameter is not provided, it truncates the file to the current position. If the size parameter is less than the current file size, the extra data will be lost
May 10, 2021 · Published May 10, 2021 • Updated Aug 11, 2023. Contribute to Docs. The .truncate() file method allows the user to resize the file to a given number of bytes when the file is accessed through the append mode.
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Syntax ¶. file. truncate ( [size]) size. Optional. If the optional size argument is present, the file is truncated to (at most) that size. The size defaults to the current position.
