Python. How to parse text by section?

As shown, this code generates a dictionary of the lines in each section, in order, indexed by the section names.

It reads through the file line by line. When it recognises a section header it notes the name. As it reads subsequent lines, until it reads the next header, it saves them in sections, as a list under that name.

If you don't want or need the line-ends then strip them off in the append statement.

>>> import re
>>> patt = re.compile(r'^\s*\[\s*(section\d+)\s*\]\s*$', re.I)
>>> sections = {}
>>> with open('to_chew.txt') as to_chew:
...     while True:
...         line = to_chew.readline()
...         if line:
...             m = patt.match(line)
...             if m:
...                 section_name = m.groups()[0]
...                 sections[section_name] = []
...             else:
...                 sections[section_name].append(line)
...         else:
...             break
...             
>>> sections
{'Section2': ['Some text in section 2\n', 'Some text\n', 'text'], 'Section1': ['Some weired text in section 1\n', '\n']}

Edit: simplified code.

>>> import re
>>> patt = re.compile(r'^\s*\[\s*(section\d+)\s*\]\s*$', re.I)
>>> sections = defaultdict(list)
>>> with open('to_chew.txt') as to_chew:
...     for line in to_chew:
...         m = patt.match(line)
...         if m:
...             section_name = m.groups()[0]
...         else:
...             sections[section_name].append(line)
... 
>>> sections
defaultdict(<class 'list'>, {'Section1': ['Some weired text in section 1\n', '\n'], 'Section2': ['Some text in section 2\n', 'Some text\n', 'text']})

try this,

text="""[Section1]
Some weired text in section 1

[Section2]
Some text in section 2
Some text
text"""
print text.split('\n\n')
>>>['[Section1]\nSome weired text in section 1', '[Section2]\nSome text in section 2\nSome text\ntext']