I keep getting errors with an "if var.startswith" statement [closed] - python

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I'm trying to make it so that I can input someone into console and have it set a variable to it, and every time with the if statement it gives the error
File "main.py", line 58, in <module>
if meInput.startswith("%send"):
AttributeError: 'builtin_function_or_method' object has no attribute 'startswith'
Here's the code:
if input.startswith("%send"):
myinput = input.split(" ", 2)[2]
channel = client.get_channel(12324234183172)
I've tried putting it into a variable such as variable = input then changing the if statement to match the variable, but it does the same thing.

Read the error message carefully! It is telling you that input is not a string, but a function — a function that would return a string if you called it, but you didn’t. Try this instead:
if input().startswith("%send"):
Note the parentheses. That is how you call a function in Python, and in most other languages.

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AttributeError: 'tuple' object has no attribute 'readlines' [closed]

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Closed 3 years ago.
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I'm new to python environments and I'm currently working on a ml project. While reading a CSV file using readlines function I'm getting "tuple has no attribute readlines". Please someone help me.....
my code is
data_file=(r"C:\Users\Sury teja\temp\mnist_train.csv","r")
print(data_file.readlines())
error is
AttributeError: 'tuple' object has no attribute 'readlines'
You missed open:
data_file = open(r"C:\Users\Sury teja\temp\mnist_train.csv", "r")
print(data_file.readlines())
In the code you wrote, data_file is just a tuple, which looks like this:
('C:\\Users\\Sury teja\\temp\\mnist_train.csv', 'r')
The error here is caused by the parenthesis around two arguments:
(r"C:\Users\Sury teja\temp\mnist_train.csv","r")
This is caused by the fact that parenthesis are serving more than one purpose in Python: they are used for calling - for example - functions, like in this example, but also for initializing immutable data structures called tuples.
By omitting the function name (open) you have initialized a tuple instead of calling the open function. And tuple, like your error suggests, has no attribute readlines.

AttributeError: 'str' object has no attribute '__name__' [closed]

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What is causing this error? Isn't it possible commenting out lines like this inside code?
for i in (Class_1, """Class_2, Class_3"""):
name = i.__name__
Class_1, Class_2 and Class_3 are classes declared before the upper code.
Error output:
> Traceback (most recent call last):
File "", line 2, in <module>
name = i.__name__
AttributeError: 'str' object has no attribute '__name__'
Process finished with exit code 1
Error message line edited to fit the example code
Remove the triple-quoted string """Class_2, Class_3""" to avoid iterating over it which is what you're doing in this case so it looks like for i in (Class_1,) (parenthesis are optional).
It seems you want to comment out those unnecessary sides, but please note that those triple-quotes strings technically aren't comments, so they can still affect the script in some areas you didn't intend.
What do you mean by
for i in (Class_1, """Class_2, Class_3"""):
When you iterate over this tuple, the second element is a string, thus causing the error.

Why will this function not open my file? [closed]

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def open_file(filename):
file_open= open(filename,"r")
return file_open
When I try and call the function I get the following results:
>>> open_file(random.txt)
Traceback (most recent call last):
File "<pyshell#17>", line 1, in <module>
open_file(random.txt)
NameError: name 'random' is not defined
try
open_file('random.txt')
Strings in Python need to be quoted.
random is being interpreted as an object, and is undefined.
You forgot quotes:
open_file('random.txt')
python thinks random is an object, which obviously you didn't define. The quotes make it a string.
you just need to input the filename as a string; here's how it must be done:
>>> open_file('random.txt')
note that your function works just fine, all you need to do is call it properly.

broken print feature in python 2.7.11 [closed]

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Closed 7 years ago.
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A problem exists in Python 2.7.11, with the print function:
elif e=="randomize w and x":
random=randint(int(w),int(x))
print random
elif e=="randomize w and y":
random=randint(int(w,int(y))
print random
The boldfaced print shows up as a syntax error, yet all 278 others in my program do not. Why this is, and how I fix it?
The problem is that in
random=randint(int(w,int(y))
a close parenthesis after w is missing, therefore Python thinks the expression continues on next line, but print at that point is a syntax error.
Your problem is not with the print statement, rather the line right before it. The line before hass inbalanced parenthesis:
random=randint(int(w,int(y))
Make sure you balance them out (add an extra ) at the end), and your error on the next line will disappear.

How to declare and fill an empty array [closed]

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I got an error using numpy.zeros, it seems like my value a can't be filled since i got an error:
track=2
a=np.zeros(shape=(3,2))
eps_real=a(Cp-0.5,2)/2*3.14*track
eps_imag=a(Cp-0.5,2*track)/2*3.14*track
tau=a(Cp-1,2)
print tau
My error when i ran is:
Traceback (most recent call last):
File "Main.py", line 35, in <module>
eps_real=a(Cp-0.5,2)/2*3.14*track
TypeError: 'numpy.ndarray' object is not callable
Collection members in Python use square brackets ([]), not parentheses. So your code should be:
eps_real=a[Cp-0.5,2]/2*3.14*track
eps_imag=a[Cp-0.5,2*track]/2*3.14*track
tau=a[Cp-1,2]
Parentheses are used for calling functions, hence the error message object is not callable

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