The reason is that beginners have not learned computational thinking, problem-solving methods and programming ideas.
The development of programming ideas needs a process, thinking in the coding process and typing more codes.
Sometimes, if someone breaks something you don't understand, the paper will break easily.
Please look at the following example.
Programming ideas 1:
People often ask how many lines of text should be extracted from a text file.
I believe everyone can understand and write counting cycles. The following code solves this problem with counting loop.
Code one:
A text file of several hundred meters needs to be written into a new file every 1000 lines.
Don't underestimate the counting period. This problem can be solved by counting cycles and judging statements.
# Encoding: utf-8
"""
Diam python remote video training
Consultation: qq: 1465376564
"""
Use open('dist_ 1.txt',' r') as f 1, and open('dist_new.txt',' w') as f2:
i = 0
For lines in f 1:
i += 1
If i% 1000 == 0:
F2. Write (line)
Code two:
Sorry, a log text file has 2000 lines. I want to extract 100 to 200 lines. How?
You can try the following methods.
Don't underestimate the while counting loop, in fact, it can be used to do many things.
# Encoding: utf-8
i = 0
file 1 = open("test.txt "，" r ")
file2 = open("out.txt "，" w ")
Although correct:
line = file 1.readline()
i += 1
if 100 & lt； Me and me & lt=200:
File2.write (line)
If I & gt200:
break
If not:
break
file 1.close()
file2.close()
Programming idea 2:
# Encoding: utf-8
"""
This code was written by Mr. Huang from Deaim Company. You can read the code yourself.
Arrested suspects A, B, C and D4. One of them is a thief. During the test:
A says I'm not a thief.
B said C was a thief.
C said the thief must be D.
D says c nonsense!
Three of them are telling the truth, one is telling a lie, and programming infers who is the thief.
(through exhaustive methods and logical expressions)
"""
For thieves in ['a',' b',' c',' d']:
Sum = (thief! = 'a')+(thief == 'c')+(thief == 'd')+(thief! ='d ')
If sum == 3:
Print "The thief is:% s% thief.
Summary: To learn python programming, first learn procedural programming, and then transition to object-oriented programming paradigm. Learn to abstract functions and classes. Develop computational thinking step by step, learn to solve problems and program ideas. This needs a process, don't rush it. Look at these videos, it may help you.