Python-master, a collection of practical Python scripts!

Python is a language that is very suitable for writing some practical small scripts and running automation, crawlers, algorithms, etc. It is very convenient.

This is also the fun part of learning Python for many people. It may only take a week to get started with the syntax, and then you can use third-party libraries to solve practical problems.

I have seen many Python code projects on Github. A few dozen lines of code can implement a scene function, which is very practical.

For example, there are many good and practical Python scripts in the warehouse Python-master. Here are a few simple examples:

1. Create QR code

import pyqrcode
import png
from pyqrcode import QRCode

# Text which is to be converted to QR code
print("Enter text to convert")
s = input(": ")
# Name of QR code png file
print("Enter image name to save")
n = input(": ")
# Adding extension as .pnf
d = n + ".png"
# Creating QR code
url = pyqrcode.create(s)
# Saving QR code asa png file
url.show()
url.png(d, scale=6)

2. Extract text from the picture

# extract text from a img and its coordinates using the pytesseract module
import cv2
import pytesseract

# You need to add tesseract binary dependency to system variable for this to work

img = cv2.imread("img.png")
# We need to convert the img into RGB format
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

hI, wI, k = img.shape
print(pytesseract.image_to_string(img))
boxes = pytesseract.image_to_boxes(img)
for b in boxes.splitlines():
b = b.split(" ")
x, y, w, h = int(b[1]), int(b[2]), int(b[3]), int(b[4])
cv2.rectangle(img, (x, hI - y), (w, hI - h), (0, 0, 255), 0.2)

cv2.imshow("img", img)
cv2.waitKey(0)

3. Determine leap year

def is_leap(year):
leap = False
if year % 4 == 0:
leap = True
if year % 100 == 0:
leap = False
if year % 400 == 0:
leap = True
return leap

year = int(input("Enter the year here: "))
print(is_leap(year))

4. Simple calendar

from tkinter import *
import calendar

root = Tk()
# root.geometry("400x300")
root.title("Calendar")

# Function

def text():
month_int = int(month.get())
year_int = int(year.get())
cal = calendar.month(year_int, month_int)
textfield.delete(0.0, END)
textfield.insert(INSERT, cal)

# Creating Labels
label1 = Label(root, text="Month:")
label1.grid(row=0, column=0)

label2 = Label(root, text="Year:")
label2.grid(row=0, column=1)

# Creating spinbox
month = Spinbox(root, from_=1, to=12, width=8)
month.grid(row=1, column=0, padx=5)

year = Spinbox(root, from_=2000, to=2100, width=10)
year.grid(row=1, column=1, padx=10)

# Creating Button
button = Button(root, text="Go", command=text)
button.grid(row=1, column=2, padx=10)

# Creating Textfield
textfield = Text(root, width=25, height=10, fg="red")
textfield.grid(row=2, columnspan=2)

root.mainloop()

5. Print image resolution

def jpeg_res(filename):
 """"This function prints the resolution of the jpeg image file passed into it"""

 # open image for reading in binary mode
 with open(filename,'rb') as img_file:

 # height of image (in 2 bytes) is at 164th position
 img_file.seek(163)

 # read the 2 bytes
 a = img_file.read(2)

 # calculate height
 height = (a[0] << 8) + a[1]

 # next 2 bytes is width
 a = img_file.read(2)

 # calculate width
 width = (a[0] << 8) + a[1]

 print("The resolution of the image is",width,"x",height)

jpeg_res("img1.jpg")

This project is just some small scripts used by the author in his daily work, which may also help you. Although the author is not a programmer, his habit of using code to solve problems will greatly improve efficiency and spur more innovative thinking. I think everyone can write such code, as long as you accumulate it slowly and practice more.

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