ChrisIf you get a binary input of tabular structured data, you can convert it to CSV easily by using str(byte)[2:-1] slicing to get rid of the b’…’ byte wrapper and apply string.replace(‘\t’, ‘,’) on the result to replace tabular characters with commas. Problem Formulation For example, say you have the following bytes format in your … Read more
💡 A code linter is a static code analysis tool to find programming errors, bugs, style mistakes, and suspicious constructs. The best Solidity Linter is Ethlint with a close second Solhint. Most other linters are not well qualified to compete with those early tools! Solidity Linter #1 – Ethlint Ethlint comes with the popular slogan … Read more
To read a binary file, use the open(‘rb’) function within a context manager (with keyword) and read its content into a string variable using f.readlines(). You can then convert the string to a CSV using various approaches such as the csv module. Here’s an example to read the binary file ‘my_file.man’ into your Python script: … Read more
To convert a Microsoft Acces table (.accdb) to a CSV file in Python, use the following four steps: Establish database connection, Run the SQL query to select data, Store the data in the CSV using basic Python file I/O and the csv module, and Close the database connection. Here’s a specific example with additional annotations … Read more
You can merge multiple text files to a single CSV file in Python by using the glob.glob(‘./*.txt’) expression to filter out all path names of text files in a given folder. Then iterate over all those path names and use the open() function to read the file contents and write append them to the CSV. … Read more
You can convert a text file to a CSV file in Python in four simple steps: (1) Install the Pandas library, (2) import the Pandas library, (3) read the CSV file as DataFrame, and (4) write the DataFrame to the file: (Optional in shell) pip install pandas import pandas as pd df = pd.read_csv(‘my_file.txt’) df.to_csv(‘my_file.csv’, … Read more
💬 Question: How to convert an .avro file to a .csv file in Python? Solution: To convert an Avro file my_file.avro to a CSV file my_file.csv, create a CSV writer using the csv module and iterate over all rows using the iterator returned by fastavro.reader(). Then write each row to a file using the writerow() … Read more
for i j in python The Python expression for i, j in XXX allows you to iterate over an iterable XXX of pairs of values. For example, to iterate over a list of tuples, this expression captures both tuple values in the loop variables i and j at once in each iteration. Here’s an example: … Read more
Problem Formulation 💬 Challenge: How to design a regular expression pattern that matches whitespace characters such as the empty space ‘ ‘ and the tabular character ‘\t’, but not the newline character ‘\n’? An example of this would be to replace all whitespaces (except newlines) between a space-delimited file with commas to obtain a CSV. … Read more
The easiest way to convert a space-delimited file to a comma-separated values (CSV) file is to use the following three lines of code: import pandas as pd df = pd.read_csv(‘my_file.txt’, sep=’\s+’, header=None) df.to_csv(‘my_file.csv’, header=None) We’ll explain this and other approaches in more detail next—scroll down to Method 3 for this exact method. Problem Formulation Given … Read more
Wrong Way to Create and Initialize a List of Lists in Python A standard way to initialize a flat list in Python is the multiplication operator to create a new list by repeatedly concatenating an existing list: 🌍 Related Tutorial: How to create a list in Python? Consequently, many beginner coders try to use the … Read more
How to write a NumPy array to a CSV file in Python? To write a NumPy array to a CSV file, use the np.savetxt() function and pass the filename as a string, as well as the array into it. Optionally, you can specific the file format, the delimiter such as comma or semicolon, and other … Read more