When I looked it up in title: python title: Here Document on Qiita, there was only one, so I wrote an article because it wasn't summarized very much!
I hope that people who use Python for the first time and those who use Python once in a while will be able to put it together with a sense of level that makes them forget how to write it. If you have any questions, please leave a comment.
version.py
python -V
Python 2.7.13
Final goal
matome.py
import textwrap
string = textwrap.dedent('''
This is a {what}.
I'm from {where}.
''').format(what="apple", where="Chiba").strip()
print(string)
"""
This is a apple.
I'm from Chiba.
"""
Such
new line
It makes it easier to handle sentences that contain.
sample.py
# \n means line break
#like this\Without writing a lot of n"Surrounding it with × 3 makes it easier to handle.
string = "Such\n line break\It makes it easier to handle sentences with n."
#Here document to write like this(Wind)
string = """
Such
new line
It makes it easier to handle sentences that contain.
"""
sample.py
# coding: utf-8
#One line comment#With
"""
Multi-line comment"It is × 3.
"""
'''
This is also a multi-line comment
is! !!
'''
The part that is not commented out like this will be a strange color, so please distinguish it.
I get an error here.
When dealing with Japanese, first # coding: utf-8.
sample.py
#This is a normal here document
string = '''This is a pen.
I'm from Tokyo.'''
print(string)
#Output result
"""
This is a pen.
I'm from Tokyo.
"""
Compare up and down. It is better to write as follows, but line breaks are added before and after, so I will correct it.
sample.py
string = '''
This is a pen.
I'm from Tokyo.
'''
print(string)
#Output result
"""
This is a pen.
I'm from Tokyo.
"""
#There is a margin at the top and bottom.
Tips to make Python here-documents easier to read I referred to this article and the comment section.
sample.py
string = '''
This is a pen.
I'm from Tokyo.
'''[1:-1]
print(string)
#Output result
"""
This is a pen.
I'm from Tokyo.
"""
Let's see how to use [1: -1].
sample.py
print("test123456789"[1:-1])
#Output result
"""
est12345678
"""
sample.py
string = '''
This is a pen.
I'm from Tokyo.
'''.strip()
print(string)
#output
This is a pen.
I'm from Tokyo.
strip () removes leading and trailing whitespace characters.
Reference article If you omit the argument of [python] strip (), not only spaces but also line breaks are removed
sample.py
print(" space5 ".strip())
print(" \nspace5\n ".strip())
#Both remove the newline and spaces.
"""
space5
"""
sample.py
string = '''\
This is a pen.
I'm from Tokyo.\
'''
print(string)
#output
"""
This is a pen.
I'm from Tokyo.
"""
Backslash \ is used when you want to start a new line in the middle of Python code, or when you want to make it longer and read better. It looks like a line break, but python ignores the line break and reads it.
print ("te\
st")
print \
("test")
"""
test
test
"""
Let's look at deleting the indent of the here document when the indent is low.
if True:
string = '''
This is a pen.
I'm from Tokyo.
'''.strip()
print(string)
"""
This is a pen.
I'm from Tokyo.
"""
import textwrap
Import this textwrap. This is the easiest.
sample.py
import textwrap
if True:
string = '''
This is a pen.
I'm from Tokyo.
'''
print(string)
print (textwrap.dedent(string).strip())
"""
--------
This is a pen.
I'm from Tokyo.
--------
"""
textwrap.dedent (string) will remove the indentation for each line.
Click here for a very helpful link. Note that I checked the format when expanding variables in a string in Python
sample.py
string = '''
This is a {what}.
I'm from {where}.
'''.format(what="apple", where="Chiba").strip()
print(string)
"""
--------
This is a apple.
I'm from Chiba.
--------
"""
{what} what="apple" I feel like I'll look it up every time I use it, such as adding {} or not enclosing what and "".
matome.py
import textwrap
string = textwrap.dedent('''
This is a {what}.
I'm from {where}.
''').format(what="apple", where="Chiba").strip()
print(string)
"""
This is a apple.
I'm from Chiba.
"""
I've written somehow what I think I'll use in here documents, but I think there are a lot of things missing, but I hope it helps!
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