Category: Python Answers

Sometimes, we want to read a text file into a string variable and strip newlines with Python.

In this article, we’ll look at how to read a text file into a string variable and strip newlines with Python.

How to read a text file into a string variable and strip newlines with Python?

To read a text file into a string variable and strip newlines with Python, we can use the replace method.

For instance, we write

with open('data.txt', 'r') as file:
    data = file.read().replace('\n', '')

to open the data.txt file with open.

And then we call file.read to read the file into a string.

Then we call the string replace method to replace all new line characters with empty strings.

Conclusion

To read a text file into a string variable and strip newlines with Python, we can use the replace method.

Sometimes, we want to modify lines in a file in-place with Python.

In this article, we’ll look at how to modify lines in a file in-place with Python.

How to modify lines in a file in-place with Python?

To modify lines in a file in-place with Python, we can use the in_place module.

We install it by running

pip install in-place

Then, we write

import in_place

with in_place.InPlace('data.txt') as file:
    for line in file:
        line = line.replace('test', 'testZ')
        file.write(line)

to open the file with in_place.InPlace(.

Then we loop throuygh the lines and call replace to replace the string 'test' in the line with 'testZ'.

And then we call file.write to write the line in place.

Conclusion

To modify lines in a file in-place with Python, we can use the in_place module.

Sometimes, we want to merge dictionaries of dictionaries with Python.

In this article, we’ll look at how to merge dictionaries of dictionaries with Python.

How to merge dictionaries of dictionaries with Python?

To merge dictionaries of dictionaries with Python, we can use the mergedeep library.

To install it, we run

pip3 install mergedeep

Then we use it by writing

from mergedeep import merge

a = {"keyA": 1}
b = {"keyB": {"sub1": 10}}
c = {"keyB": {"sub2": 20}}

merge(a, b, c)

print(a)

to call merge with dicts a, b, and c.

Then a will have the content of b and c in addition to the existing content.

Conclusion

To merge dictionaries of dictionaries with Python, we can use the mergedeep library.

Sometimes, we want to translate an ISO 8601 datetime string into a Python datetime object.

In this article, we’ll look at how to translate an ISO 8601 datetime string into a Python datetime object.

How to translate an ISO 8601 datetime string into a Python datetime object?

To translate an ISO 8601 datetime string into a Python datetime object, we can use the dateutil parser.parse method.

For instance, we write

from dateutil import parser

your_date = parser.parse(date_string)

to call parser.parse with date_string to convert the ISO 8601 date_string into the your_date datetime object.

Conclusion

To translate an ISO 8601 datetime string into a Python datetime object, we can use the dateutil parser.parse method.

Sometimes, we want to fix TypeError: a bytes-like object is required, not ‘str’ when writing to a file in Python 3.

In this article, we’ll look at how to fix TypeError: a bytes-like object is required, not ‘str’ when writing to a file in Python 3.

How to fix TypeError: a bytes-like object is required, not ‘str’ when writing to a file in Python 3?

To fix TypeError: a bytes-like object is required, not ‘str’ when writing to a file in Python 3, we can open the file with open and 'r‘.

For instance, we write

with open(fname, 'r') as f:

  # ...

to open the file at path fname with open.

We open it with read permission as a string with 'r'.

Conclusion

To fix TypeError: a bytes-like object is required, not ‘str’ when writing to a file in Python 3, we can open the file with open and 'r‘.