Matplotlib not working

[svalencic]

Hi everyone,

I'm getting error while using Matplotlib. Importing it using import matplotlib.pyplot as plt works perfect, however any other functions, such as:

x = np.linspace(-10 , 10, 100)
y = np.sin(x) 
plt.plot(x, y, marker="x")
plt.show()

Returns very large error:

Error:
Traceback (most recent call last):

File "\Giraffe\app.py", line 4, in <module>

print(plt.plot([1,2,3],[2,4,6]))

~~~~~~~~^^^^^^^^^^^^^^^^^

File ".venv\Lib\site-packages\matplotlib\pyplot.py", line 3829, in plot

return gca().plot(

~~~^^

File "venv\Lib\site-packages\matplotlib\pyplot.py", line 2776, in gca

return gcf().gca()

~~~^^

File "\.venv\Lib\site-packages\matplotlib\pyplot.py", line 1108, in gcf

return figure()

File "\.venv\Lib\site-packages\matplotlib\pyplot.py", line 1042, in figure

manager = new_figure_manager(

num, figsize=figsize, dpi=dpi,

facecolor=facecolor, edgecolor=edgecolor, frameon=frameon,

FigureClass=FigureClass, **kwargs)

File "ib\site-packages\matplotlib\pyplot.py", line 552, in new_figure_manager

return _get_backend_mod().new_figure_manager(*args, **kwargs)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^

File \Giraffe\.venv\Lib\site-packages\matplotlib\backend_bases.py", line 3501, in new_figure_manager

return cls.new_figure_manager_given_figure(num, fig)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^

File "iraffe\.venv\Lib\site-packages\matplotlib\backend_bases.py", line 3506, in new_figure_manager_given_figure

return cls.FigureCanvas.new_manager(figure, num)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^

File "\matplotlib\backend_bases.py", line 1783, in new_manager

return cls.manager_class.create_with_canvas(cls, figure, num)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^

File "\.venv\Lib\site-packages\matplotlib\backends\_backend_tk.py", line 507, in create_with_canvas

window = tk.Tk(className="matplotlib")

FilePython\Python313\Lib\tkinter\__init__.py", line 2459, in __init__

self.tk
 = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)

~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

_tkinter.TclError: Can't find a usable init.tcl in the following directories:

This probably means that Tcl wasn't installed properly.

Process finished with exit code 1

Larz60+ write Dec-17-2024, 10:35 PM:
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[deanhystad]

The code you posted is not the code that raised the exception. According to the error message, this is the code causing the problem.

print(plt.plot([1,2,3],[2,4,6]))

In file:

Output:
\Giraffe\app.py

Can you post that file?

[svalencic]

Many thanks for reply. I tried both:

import matplotlib.pyplot as plt
x = np.linspace(-10 , 10, 100)
y = np.sin(x)
plt.plot(x, y, marker="x")
plt.show()

as well as:

import matplotlib.pyplot as plt
print(plt.plot([1,2,3],[2,4,6]))

The error is the same in both cases. What is wrong?

[snippsat]

\.venv this means that you use virtual environment,make sure it active before run.
Now it run out environment as here and use OS Python,this should not happened:

FilePython\Python313\Lib\tkinter\__init__.py", line 2459, in __init__

Here a quick demo with virtual environment.

G:\div_code
λ python -m venv my_env
λ cd my_env\
# Activate
λ G:\div_code\my_env\Scripts\activate
# Install
(my_env) pip install matplotlib numpy
# code your code and it run fine

[svalencic]

First and second blocks of code return the same error:
SyntaxError: unexpected character after line continuation character