How to Get a Function Name as a String in Python
In Python, there are 2 ways to get a function name as a string.
Using __name__ Attribute
Using __qualname__ is the preferred method as it applies uniformly. It works on built-in functions as well:
#!/usr/bin/python3
def my_func():
pass
class...
How to Get the Size of a File in Python
In Python, there are 3 ways to get the size of a file.
Using os.path.getsize Method
The os.path.getsize() method returns the size, in bytes, of path. Raise OSError if the file does not exist or is inaccessible. For example,
#!/usr/bin/python3
#...
How to Copy a File in Go
In Golang, there are 2 ways to copy a file.
Using io.Copy Function
You can copy a file using the io.Copy() function. For example,
package main
import (
"io"
"os"
)
// Copy the src file to dst.
func Copy(src, dst string) error {
in, err...
How to Get File Creation and Modification Dates Times in Python
In Python, there are 3 ways to get file creation and modification dates times.
Using os.path Function
The os.path.getmtime() function returns the time of last modification of path.
The os.path.getctime() function returns the system’s ctime which, o...
How to Get File Length in Go
In Golang, there are 2 ways to get file length.
Using file.Stat Function
Open opens the named file for reading. If successful, methods on the returned file can be used for reading; the associated file descriptor has mode O_RDONLY.
See the followin...
How to Access Command-Line Arguments in Go
In Golang, there are 2 ways to access command-line arguments passed to a program.
Using os.Args Variable
You can access the command-line arguments using the os.Args variable.
Note that the first value in this slice is the path to the program, and o...
How to Append Text to a File in Go
In Golang, using the os.O_APPEND flag is the easiest way to append text to a file
Using os.OpenFile Function
OpenFile is the generalized open call; most users will use Open or Create instead. It opens the named file with specified flag (O_RDONLY etc...
How to Access Command Line Parameters in Rust
In Rust, there are 2 ways to access command line parameters.
Using std::env::args Function
This function actually returns the arguments that this program was started with. See the following example:
use std::env;
fn main() {
for arg in env::...
How To Install Rust in Linux
In Rust, there are two ways to install rust in Linux.Running the following in your terminal
If you’re running macOS, Linux, or another Unix-like OS. To download Rustup and install Rust, run the following in your terminal, then follow the on-screen i...
How to fetch data from url in Python
Fetch Internet Resources Using The urllib Package.Fetching URLs
The simplest way to use urllib.request is as follows:
#!/usr/bin/env python3
# Import datetime module
import urllib.request
with urllib.request.urlopen('https://google.com') as respon...
How to convert string to json in Python
Converting Json to string in Python.Decoding JSON
To convert string to json in Python, use the json.loads() function. The json.loads() is a built-in Python function that accepts a valid json string and returns a dictionary to access all elements. The...
How to convert interface to int64 in Go
Interface variable conversion in Golang.Type Assertion
To convert interface to int64 in Go, Using Type Assertion.
A type assertion provides access to an interface value's underlying concrete value.
package main
import "fmt"
// t := i.(T)
// t, ok ...
How to convert interface to string in Go
Type casting an interface to a string in go.Using fmt.Sprintf Function
To convert interface to string in Go, use fmt.Sprintf function.
Sprintf formats according to a format specifier and returns the resulting string.
package main
import "fmt"
var ...
How to use the gzip command in Linux
Compress or uncompress FILEs.
Gzip reduces the size of the named files using Lempel-Ziv coding (LZ77). Whenever possible, each file is replaced by one with the extension .gz, while keeping the same ownership modes, access and modi‐ficati...
How to use the df command in Linux
Show information about the file system on which each FILE resides, or all file systems by default.
df (abbreviation for disk free) is a standard Unix command used to display the amount of available disk space for file systems on which the invoking us...