Python basic tutorial: Python standard library uses the OrderedDict class to explain examples

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today will share an explanation about the use of the OrderedDict class in the Python standard library. The editor feels that the content is quite good. It has a good reference value. Friends who need it follow the editor to see it.
Goal: Create a dictionary, record several pairs of python words, use the OrderedDict class to write, and output in order.

Error after writing:

[root@centos7 tmp]# python python_terms.py 
 File "python_terms.py", line 9
  from name,language in python_terms.items():
       ^
SyntaxError: invalid syntax

code show as below:

from collections import OrderedDict
python_terms = OrderedDict()
python_terms['key'] = 'vlaue'
python_terms['if']  = 'match'
python_terms['from'] = 'import'
from name,language in python_terms.items():
  print("python have many terms " + name.title() +
    language.title() + '.')
~

As a result, the for loop is written as from ... There are always simple errors.

Finally, the correct code is as follows:

from collections import OrderedDict
python_terms = OrderedDict()
python_terms['key'] = 'vlaue'
python_terms['if']  = 'match'
python_terms['from'] = 'import'
for name,language in python_terms.items():
  print("python have many terms " + name.title() +
    " " + language.title() + '.')

The first line, import the OrderedDict class from the module collections;

In the second line, an instance of the OrderedDict class is created and stored in python_terms, that is, an empty dictionary is created;

The third to fifth lines add key-value pairs to the dictionary;

Finally, the results are output in a loop.

operation result:

[root@centos7 tmp]# python python_terms.py 
python have many terms Key Vlaue.
python have many terms If Match.
python have many terms From Import.

Thank you very much for reading
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