3.30 --- time, random, sys, os module practice

1, retrieve folder size

Required to perform as follows:

python3.8 run.py folder

import os
import sys

def file_size(file_path):
    size = 0
    if not os.path.isdir(file_path):
        return
    file_list = os.listdir(file_path)
    for name in file_list:
        son_path = os.path.join(file_path, name)
        if os.path.isdir(son_path):
            size += file_size(son_path)
        # elif os.path.isfile(son_path):
        else:
            size += os.path.getsize(son_path)
    return size

file_path = sys.argv[1]
size_of_file = file_size(file_path)
print(size_of_file)

 

2, the random codes

Import Random
 # random codes 
DEF random_code (= size. 4 ): 
    code = "" 
    for I in Range (size): 
        alp_up = CHR (the random.randint (65, 90, )) 
        alp_low = CHR (the random.randint (97,122 )) 
        NUM = STR (the random.randint (0,9 )) 

        # the second list weights = [] stored in the weight of each element, k is the selected frequency value is returned list 
        single_code = random.choices ([alp_low, alp_up , num] , weights = [1,1,2], K = 2 ) 
        code + = single_code [0]
     return code 

Print (random_code ())

 

3, analog download progress bar

Import Time
 DEF downloads (): 
    Total = 50000 
    Speed = 1024 
    acum = 0
     the while acum < Total: 
        the time.sleep ( 0.1 ) 
        acum + = Speed 

        Percent = acum / Total
         IF Percent>. 1 : 
            Percent =. 1 
        Wide = int (* Percent 50 ) 
        show_str = " # " * Wide
         # every time the print result before covering, dynamic effects. percent * 100 percent loaded display
        print("\r[%-50s] %d%%" %(show_str,percent*100),end="")
        
download()

 

4, text copy script

# 法一:
import sys
src_file = sys.argv[1]
dst_file = sys.argv[2]

with open(src_file,mode="rb") as f,\
    open(dst_file,mode="wb") as f1:
    f1.write(f.read())
#====================================
# 法二：
import sys
import shutile
src_file = sys.argv[1]
dst_file = sys.argv[2]

shutil.copyfile(src_file, dst_file)