CODEWITHSUNDEEP
pythonscope
Hovestar
Hovestar

Reputation: 1627

dir inside function

Python has a nice feature that gives the contents of an object, like all of it's methods and existing variables, called dir(). However when dir is called in a function it only looks at the scope of the function. So then calling dir() in a function has a different value than calling it outside of one. For example:

dir()
> ['__builtins__', '__doc__', '__loader__', '__name__', '__package__', '__spec__']
def d():
  return dir()
d()
> []

Is there a way I can change the scope of the dir in d?

Upvotes: 6

Views: 1088

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1121584

dir() without an argument defaults to the current scope (the keys of locals(), but sorted). If you wanted a different scope, you'd have to pass in an object. From the documentation:

Without arguments, return the list of names in the current local scope. With an argument, attempt to return a list of valid attributes for that object.

For the global scope, use sorted(globals()); it's the exact same result as calling dir() at the module level.

Upvotes: 11

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