Python Helloworld simple implementation

A friend who has learned programming languages will surely have a deep understanding of Helloworld. Almost at the early stage of language learning, we will have a deep understanding of the programming language through this simple applet. So today we will introduce the implementation method of the Python Helloworld program.

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Before creating the Python Helloworld program, you must create a new file c: \ test. py.

Write this stuff in this file

Str = "hello world"
Print str

In this way, we can write a script.

Execute such a statement in the command line of python.

Execfile ("c: \ test. py ")

Now, we can see the result.

Now we have another requirement, that is, we need to use an independent file to write some configuration parameters.

For example, we can create a Global. py file under the root directory of drive C.

Write some statements str1 = "hello world2" in it"

So how do we use them? Change test. py to the following.

 
 

  
  
import sys  
  
  
sys.path.append('.')  
  
  
import Global  
  
  
str = "hello world" 
  
  
print str   
  
  
print Global.str1 
 
 

Now we can execute such a statement in python command line.

 
 

  
  
execfile("c:\\test.py")  
  
  
trouble shooting :  
 
 

This problem may occur during the implementation of the Python Helloworld program.

 
 

  
  
import Global  
  
  
ImportError: No module named Global 
 
 

This is because he does not find the corresponding Global file below C:

Let's first confirm the details.

Check the current working directory.

 
 

  
  
import os   
  
  
os.getcwd() 
 
 

At this time, it may be the python installation directory.

Of course, the Global. py cannot be found.

What we need to do is OS. chdir ("c :\\")

Then we are executing OS. getcwd (). Let's see if the working directory has changed.

Execfile ("c: \ test. py ")

OK

Of course, we can also do this:

 
 

  
  
C:\>python test.py  
  
  
hello world  
  
  
hello world2 
 
 

The above are the main implementation steps of the Python Helloworld program.