Python-master，實用Python腳本合集！

Python這門語言很適合用來寫些實用的小腳本，跑個自動化、爬蟲、演算法什麼的，非常方便。

這也是很多人學習Python的樂趣所在，可能只要花個禮拜入門文法，就能用第三方函式庫去解決實際問題。

我在Github上就看到過不少Python程式碼的項目，幾十行程式碼就能實現一個場景功能，非常實用。

比方說倉庫Python-master裡就有很多不錯的實用Python腳本，舉幾個簡單例子：

1. 建立二維碼

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. 從圖片中截取文字

# 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. 判斷閏年

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. 簡易行事曆

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. 列印圖片解析度

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")

這個專案只是作者平常工作用到的一些小腳本，可能也會幫助到你。作者雖然不是程式設計師，但他這種用程式碼解決問題的習慣會極大的提升效率，也會迸發出更多的創新思維。我覺得這樣的程式碼每個人都可以寫出來，只要慢慢累積多練習就可以。

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