Experiment 5 module, package and Library

Experiment five

2022.06.01 Afternoon experiment

Experiment five modular 、 Baoheku

Preface

This article is 【Python Language foundation 】 Column articles , Mainly the notes and exercises in class
Python special column Portal
The experimental source code has been in Github Arrangement

Topic 1

Use Datetime Module gets the current time , And indicate the year of the current time 、 month 、 Japan 、 Weeks , And the day is the day of the week

Problem analysis

utilize datetime().now Get the current date

utilize one_time Save the first day of the current month , strftime(‘%W’) You can get the current day in the week of the year , The two are subtractive +1 It's the number of weeks

That day is the day of the week ：datetime.now().weekday() perhaps datetime.now().strftime（’%w’） Get weeks

Reference resources ：Python strftime( ) function

Code

""" @Author: Zhang Shier  @Date:2022 year 06 month 01 Japan  @CSDN: Zhang Shier  @Blog:zhangshier.vip """
from datetime import datetime
now_time = datetime.now ()  # current time 
one_time = now_time.replace(day=1, hour=0, minute=0, second=0, microsecond=0)   # Set the first day of the month 
week_num=int(now_time.strftime('%W')) - int(one_time.strftime('%W'))+1  # now- The first week of this month +1= Current weeks  strftime('%W') What week of the year 
print(f" The first {
      week_num} Zhou ")
print (f"{
      now_time.year} year {
      now_time.month} month {
      now_time.day} Japan ")

print(f" Day of the week {
      datetime.now().weekday()+1} God ")     # weekday return 0~6 therefore +1
print(f" Day of the week {
      datetime.now().strftime('%w')} God ")  # strftime Returns the number of days in the week 

result

Topic two

Use Random Module and Numpy The library generates a 3 That's ok 4 Multidimensional array of columns , Each element in the array is 1~100 Random integer between , Then find the average of all the elements of the array

Problem analysis

utilize np.random.randint( Range , Range ,( That's ok , Column )) Generate 1~1003 That's ok 4 Multidimensional array of columns

Code

""" @Author: Zhang Shier  @Date:2022 year 06 month 01 Japan  @CSDN: Zhang Shier  @Blog:zhangshier.vip """
import numpy as np
a= np.random.randint(1,100,(3,4))    #1~100  Three row and four column array 
print(a)
sum=0
for i in range(3):
    for j in range(4):
        sum+=a[i][j]
average=sum/12
print(" The average is : %.2f" %average)

result

Topic three

Use Matplotlib Library drawing y=2x+1 and y=x2 The graphic , And set the name of the coordinate axis and the diagram column

Problem analysis

utilize numpy Definition x The scope is 1~50, use Matplotlib library ,plot( function , Color , thickness ) Defined function ,legend() Define legend

Code

""" @Author: Zhang Shier  @Date:2022 year 06 month 01 Japan  @CSDN: Zhang Shier  @Blog:zhangshier.vip """
#  You can output the results , The red error report is a problem with the database 
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(1,50)
plt.plot(x,2*x+1,'red',lw=2)
plt.plot(x,x**2,'b',linestyle='dashed',lw=2)
plt.legend(['2*x+1', 'x**2'])     	         # Set legend 
plt.show()

result

Topic four

Write a program , Realize word segmentation and statistics of a Chinese article , The results are displayed by word cloud

Problem analysis

Prepare a test file in advance , Save the data to be processed , And a picture as the background of the cloud picture . Read in the file and use jieba.lcut() Word segmentation for strings , After through wordcloud The module generates a cloud map

Reference resources ：wordcloud Parameters, , Great detail

Code

""" @Author: Zhang Shier  @Date:2022 year 06 month 01 Japan  @CSDN: Zhang Shier  @Blog:zhangshier.vip """
#  Required libraries 
# pip install wordcloud
# pip install jieba
# pip install imageio
#  Create a new... In the code directory txt Text ,Experiment 5.4_open.txt： The 18th National Congress of the Communist Party of China proposed , Advocate prosperity 、 democracy 、 civilization 、 harmonious , Advocate freedom 、 equality 、 justice 、 The rule of law , Advocate patriotism 、 dedicated 、 The good faith 、 friendly , Actively cultivate and Practice Socialist Core Values . Rich and strong (powerful) 、 democracy 、 civilization 、 Harmony is the value goal at the national level , free 、 equality 、 justice 、 The rule of law is the value orientation at the social level , patriotic 、 dedicated 、 The good faith 、 Friendliness is the value criterion at the individual level of citizens , this 24 One word is the basic content of the socialist core values .
#  Prepare a background image , modify 38 That's ok ,WordCloud The white part will be removed as the outline 

import jieba
import imageio.v2 as imageio
from wordcloud import WordCloud

with open("Experiment 5.4_open.txt", "r",encoding='UTF-8') as f:
    allSentence = f.read()

print(allSentence)

re_move = [',', '.', '\n', '\xa0', '-', '(', ')']  #  Invalid data 

#  Remove irrelevant data 
for i in re_move:
    allSentence = allSentence.replace(i, "")

pureWord = jieba.lcut(allSentence)
# Experiment 5.4_out.txt Save word segmentation results 
with open("Experiment 5.4_out.txt", "w") as f:
     for i in pureWord:
         f.write(str(i)+" ")

with open("Experiment 5.4_out.txt", "r") as f:
    pureWord = f.read()

mask = imageio.imread("Experiment 5.4_bg.png")
word = WordCloud(background_color="white",
                 width=800,height=800,
                 font_path='simhei.ttf',
                 mask=mask,).generate(pureWord)
#  Generate cloud map  Experiment 5.4_outphoto.png
word.to_file('Experiment 5.4_outphoto.png')

result

Topic 5

Customize a module , Then make calls in other source files 、 test

Problem analysis

stay Experiment_5_test.py File to write a function , stay Experiment 5.5.py Pass through import Experiment_5_test（ or import Experiment_5_test as test） Import library , Then call and test

Code

#Experiment_5_test.py
def func_test():
  return ' test A55 Module func_test() function '

#  Alias 
import Experiment_5_test as test
print(test.func_test())
#  Direct import library 
import Experiment_5_test
print(Experiment_5_test.func_test())

result