I tried to touch Python (basic syntax)

Introduction

I tried to touch Python (installation) continued

Things to check & do in advance

--Japanese characters are garbled when connecting to a virtual machine with SSH. ――When I looked it up, I was surprised that the following article was in trouble! -What to do if garbled characters on CentOS under SSH environment

Virtual machine

#Status check → VC Keymap is us
$ localectl status
   System Locale: LANG=ja_JP.utf8
       VC Keymap: us
      X11 Layout: n/a
#Updated VC Keymap to jp106(Run with sudo)
$ sudo localectl set-keymap jp106
#Check the status again → VC Keymap updated to jp106
$ localectl status
   System Locale: LANG=ja_JP.utf8
       VC Keymap: jp106
      X11 Layout: jp
       X11 Model: jp106
     X11 Options: terminate:ctrl_alt_bksp
#Check if Japanese locale can be used → There is no ja in the first place! ??
$ localectl list-locales | grep -i ja
#Added Japanese locale
$ sudo localedef -f UTF-8 -i ja_JP ja_JP
#Make sure the Japanese locale is enabled
$ localectl list-locales | grep -i ja
ja_JP
ja_JP.utf8

Learn basic syntax

Execute a normal program

Let's create and run the following program to learn the basic syntax.

Command execution

# .Create py file
$ vi test02.py

test02.py

print('Module loading')

def test():
    print('Function: called test')

if __name__ == '__main__':

    print('python-izm')
#   print('Python ism')
    test()

Command execution

#Created using Python commands.Run py file
$ python test02.py
Module loading
python-izm
Function: called test

UTF-8 is applied by default for character encoding of 3 series, so you do not have to be aware of it.

• In the case of 2 series, it seems that it is necessary to explicitly declare it on the first line.

Execute anomalous program (indent)

Python uses indentation for its block structure. Since {} is not used, an error will occur if the indentation is not consistent.

Command execution

# .Create py file
$ vi test03.py

test03.py

print('Module loading')

def test():
        print('Function: called test')

#Execute only when the target program is started as a script
#Not executed when importing etc.
if __name__ == '__main__':

      print('python-izm')
#   print('Python ism')
    test()

Command execution

#Created using Python commands.Run py file
$ python test03.py
  File "test03.py", line 10
    test()
         ^
IndentationError: unindent does not match any outer indentation level

IndentationError: unindent does not match any outer indentation level IndentationError: unindent does not match any outer indentation level

The error message that google teacher says is the above.

in conclusion

You only have to be careful about the block structure of the indent, I've touched the GO language before, so I didn't feel any discomfort.

As for the future flow, I will write an article if I can make something after implementing the basic and advanced editions! (Because it is easier to remember character strings and if statements than to write articles)