Catalog

• Create array
• Output format
• • pycharm Output with color
• Traverse
• • Traversal of array
• function
• • System function OS

Create array

[ [0] * 5 for i in range(2)]
[[0 for i in range(10)] for i in range(10)]

Output format

pycharm Output with color

print('\033[0;36m',a,'\033[0m')
print('\033[0;36m'+name,'\033[0m') # There is no space before this improvement 

https://blog.csdn.net/weixin_30768175/article/details/95295151

Traverse

Traversal of array

colours = ["red","green","blue"]
for colour in colours:
print colour
colours = ["red","green","blue"]
for i in range(0, len(colours)):
print i, colour[i]

function

System function OS

path = os.getcwd() # Get the current path 
print (os.listdir(path)) # Print all file names and directory names under the current path , The return value is an array 
os.remove("aa.txt") # Delete file