Python built-in function that returns a string from an arbitrary object. Abbreviation for "representation".
Questions tagged [repr]
281 questions
7
votes
1 answer
Output difference between ipython and python
It was my understanding that python will print the repr of the output, but this is apparently not always the case. For example:
In ipython:
In [1]: type([])
Out[1]: list
In [2]: set([3,1,2])
Out[2]: {1, 2, 3}
In python:
>>> type([])
wim
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6
votes
0 answers
Nativecall Segfaults Getting Tuple from Rust
Per the Rust FFI Omnibus the following should work.
This is a rust cdylib lib.rs named "foo" made with cargo build...
use std::convert::From;
// Rust FFI Omnibus: Tuples
// http://jakegoulding.com/rust-ffi-omnibus/tuples/
// A Rust function that…
librasteve
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6
votes
0 answers
How do I get the primitive representation of a generic enum in Rust?
I have a function that reads bits and creates an enum.
Currently the caller needs to provide both the EnumType and the representation of this enum.
How do I change the function such that the representation is deduced from the EnumType, such that the…
Sjors Donkers
- 61
- 3
6
votes
0 answers
repr and super in Python 2.7. `super().__repr__` vs `repr(super())`
Question: Why is repr(super(class, thing)) different from super(class, thing).__repr__()?
I've come across something that I think is odd, would be great if someone has an explanation for why this works the way it does.
My question is about how repr…
user27182
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- 9
6
votes
3 answers
Matlab repr function
In Matlab, one can evaluate an arbitrary string as code using the eval function. E.g.
s = '{1, 2, ''hello''}' % char
c = eval(s) % cell
Is there any way to do the inverse operation; getting the literal string representation of an…
jmd_dk
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6
votes
4 answers
How to print __repr__ in a Python3 file? (not in shell)
I know that in Python Shell when you type >>> object it shows the object.__repr__ method and if you type >>> print(object) it shows the object.__str__ method.
But my question is, is there a short way to print __repr__ while executing a Python…
YoomarXD
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- 10
6
votes
1 answer
Writing a repr method
Situation:
I'm new to python and currently trying to learn the ropes, I've attempted creating a linked list class to assist in getting a better understanding of the language and its structures. I know that the __repr__ function is basically…
user6457225
6
votes
3 answers
Error with T::iterator, where template parameter T might be vector or list
I'm trying to write a function to print a representation of common STL containers (vector, list, etc..). I gave the function a template parameter T which, for example, might represent vector. I'm having problems getting an iterator of type…
bretttolbert
- 984
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6
votes
3 answers
__repr__() returned non-string
So I have a class method with which I would like to draw out the dictionary and it's values:
def __repr__ (self):
for row in zip(*([ky]+map(str,val) for ky,val in (self.slovar.items()))):
print"\t".join (row)
If it's like…
user1509923
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6
votes
1 answer
Python accent graves bad practice?
I have recently come to understand that we can use the following as a shorthand for repr(x) in Python:
`x`
However, I have rarely seen this in practice. Is it considered to be bad practice or unpythonic? Or are there any other reasons for which it…
arshajii
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5
votes
6 answers
Python __repr__ and None
I'm quite new to Python and currently I need to have a __repr__ for a SqlAlchemy class.
I have an integer column that can accept Null value and SqlAlchemy converts it to None.
For example:
class Stats(Base):
__tablename__ = "stats"
description…
Patrizio Rullo
- 491
- 1
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5
votes
5 answers
How to set a repr for a function itself?
__repr__ is used to return a string representation of an object, but in Python a function is also an object itself, and can have attributes.
How do I set the __repr__ of a function?
I see here that an attribute can be set for a function outside the…
Pranab
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5
votes
1 answer
__repr__ for Exception derived class not works well
I tried to use __repr__ method on object that inherit from Exception.
but nothing was printed!
Can anyone help explain why?
class MyException(Exception):
def __repr__(self):
return "MyException Object"
try:
raise…
Ori.B
- 109
- 6
5
votes
2 answers
How to convert a deeply nested list to a string
If I make a deeply nested list, like this:
arr = [1]
for i in range(1000):
arr = [arr]
then
print(arr)
will work fine, but
str(arr)
fails miserably with maximum recursion depth exceeded. ("%s" % arr, and repr(arr) too.)
How could I get the…
vagoston
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- 8
5
votes
2 answers
Is __repr__ supposed to return bytes or unicode?
In Python 3 and Python 2, is __repr__ supposed to return bytes or unicode? A reference and quote would be ideal.
Here's some information about 2-3 compatibility, but I don't see the answer.
Hatshepsut
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