Generate python code for execution (auto correct """)

Question

I write a python code generator as an input it has a source code: source Part of the output I need to generate is execute(source_code) When source_code is a string representing source . If I write "execute({0})".format(source) for input source = "import sys" i'll get execute(import sys). So I tried : execute(\"\"\"{0}\"\"\")format(source). Is it ok? I tried to test it...Sometimes it is ok....The problem occurs when inside the source there are""" For example:

from IPython.display import HTML

HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")

my code turns to be

execute("""from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")""")

UPD: Changing the code to

execute('''{0}''').format(source)

doesn`t solve the problem, the issue will be encountered with :

def tojson(data):
    '''Shorten the code to respond a little bit.'''
    print(json.dumps(data))

Mike Müller · Accepted Answer · 2017-02-28 16:52:03Z

1

Using single triple quotes should help:

execute('''from IPython.display import HTML
HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")''')

Running in a Notebook, you need to use eval() to actually display the HTML:

exec('''from IPython.display import HTML''')
eval('''HTML("""
<script>
console.log("hello");
</script>
<b>HTML</b>
""")''')

In your case probably:

execute('''{0}''').format(source)

Works also if there are ''' inside the string:

source = """
def add(a, b):
    '''Add'''
    return a + b

print(add(1, 2))
"""

exec('''{0}'''.format(source))

Output:

edited Feb 28, 2017 at 16:52

answered Feb 28, 2017 at 15:48

Mike Müller

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1 Comment

YAKOVM Over a year ago

changing to execute('''{0}''')format(source) indeed works! thanks! but what happens if inside source there is '''? I will encounter the same issue?

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