NameError: name 'output' is not defined
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how to resolve name error in python
nameerror: name 'hello' is not defined
I've just started learning python and was writing a (seemingly) simple program but encountered the "name not defined" error.
This is my code:
if iDisL == cDisL or iDisL == cDisR: output = iDisL if iDisR == cDisL or iDisR == cDisR: output = iDisR oFile = open("manout.txt", "w") oFile.write(output)
The strange thing is this worked the first time when running, but did not when I plugged in a new set of numbers into my input file. I am running python 3.
(iDisL == cDisL or iDisL == cDisR) and
(iDisR == cDisL or iDisR == cDisR) are
False, output is not defined. Note that.
it's raised when a local or global name is not found.
input() error - NameError: name '' is not defined, TL;DR. input function in Python 2.7, evaluates whatever your enter, as a Python expression. If you simply want to read strings, then use Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.
NameErrorexception occurs when code tries to access a variable that hasn't been assigned yet.
I would suggest you to define default value for cases when
iDisR are not equal to
Python Language - NameError: name '???' is not defined, Python Language NameError: name '???' is not defined. Example#. Is raised when you tried to use a variable, method Stack Overflow Public questions and answers; Teams Private questions and answers for your team; Enterprise Private self-hosted questions and answers for your enterprise; Talent Hire technical talent
Try this to solve your problem:
output = "" if iDisL == cDisL or iDisL == cDisR: output = iDisL if iDisR == cDisL or iDisR == cDisR: output = iDisR oFile = open("manout.txt", "w") oFile.write(output)
Or check if output is "" and don't write the file.
2.1: "NameError: name 'is_hungry' is not defined" yet I pass the test , 2.1: "NameError: name 'is_hungry' is not defined" yet I pass the test. My code: # Class definition class Animal(object): """Makes cute animals.""" # For initializing our NameError: name 'Tree' is not defined That's because the class has not been defined yet at this point. The workaround is using so called Forward Reference, i.e. wrapping a class name in a string, i.e. class Tree: def __init__(self, left: 'Tree', right: 'Tree'): self.left = left self.right = right
Python error "NameError: name 'sr' is not defined", Other names are defined within the program (ex. variables). If Python encounters a name that it doesn't recognize, you'll probably get NameError: (Feb-04-2017, 04:50 AM) hsunteik Wrote: Nevermind,my mistake,found the problem and fixed it. Some pointer,there are a style issues and none stander way of doing this stuff.
Intro Python Debugging, A NameError means that Python tried to use a variable or function name, such as hello based on a previous definition. If it hasn't been defined at this point, you Traceback (most recent call last): File "<pyshell#12>", line 1, in <module> plt.figure() NameError: name 'plt' is not defined Does anybody know why? python python-3.x matplotlib
NameError: name 'magnitude_pruner' is not defined · Issue #466 , NameError: name 'magnitude_pruner' is not defined #466 NameError Traceback (most recent call last) in 16 sys.path.append(module_path) NameError: name 'xx' is not defined Python knows READ MORE. answered Mar 19 in Python by rahul • 320 points • 16,185 views. python; python-programming; python
- Well, what happens if neither one of your two
ifstatements is executed?
- Variables spring into existence through magic the first time you assign them a value. If you never do that, they don't exist.
- Try adding a
ifstatements and let us know which
- You might also have a problem if both conditions are true, depending on what your expected output is in that case (
iDisR). If you expect exactly one of them to be true, you need to handle the other cases (i.e. neither or both) as errors.