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ValueError: source code string cannot contain null bytes importing pandas in python

When i try to import pandas in a python code it gives me the error:
File "Traceback (most recent call last):
File "c:\Users\Adrian\Desktop\alkemy\src\py_functions\transform_univ_jfk.py", line 4, in <module>
import pandas as pd
File "C:\Users\Adrian\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\__init__.py", line 141, in <module>
from pandas.io.api import (
File "C:\Users\Adrian\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\io\api.py", line 6, in <module>
from pandas.io.excel import (
File "C:\Users\Adrian\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\io\excel\__init__.py", line 1, in <module>
from pandas.io.excel._base import (
File "C:\Users\Adrian\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\io\excel\_base.py", line 75, in <module>
from pandas.io.parsers import TextParser
File "C:\Users\Adrian\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pandas\io\parsers\__init__.py", line 1, in <module>
from pandas.io.parsers.readers import (
ValueError: source code string cannot contain null bytes
I was using python until about a month ago without errors, my cousin used my computer for a few days and I don't know what she did, I reinstalled python and it still gives me errors

Recent syntax error using Python2 vs. Python3

I have a script using openpyxl to add rows to an existing xlsx spreadsheet. It was running fine a couple of weeks ago: however, when I run it now, it starts to give me different syntax error in Python2 and Python3.
The problem I have is that the syntax error is pointing to the import packages rather than somewhere in code.
Any suggestion on how to fix these syntax issues?
Error with Python2
IDA-Data host$ python2 add_name_excel_dirs.py
Traceback (most recent call last):
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 62, in <module>
import os
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 400, in <module>
import UserDict
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/UserDict.py", line 116, in <module>
import _abcoll
File "/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.py", line 662
def append(self, value: object) -> object:
^
SyntaxError: invalid syntax
Error with Python3 when running the same script:
IDA-Data host$ python3 add_name_excel_dirs.py
Traceback (most recent call last):
File "add_name_excel_dirs.py", line 5, in <module>
from openpyxl import load_workbook
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/openpyxl/__init__.py", line 26, in <module>
from openpyxl.compat.numbers import NUMPY, PANDAS
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/openpyxl/compat/__init__.py", line 5, in <module>
from .strings import (
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/openpyxl/compat/strings.py", line 9, in <module>
from .numbers import NUMERIC_TYPES
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/openpyxl/compat/numbers.py", line 28, in <module>
import pandas
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/__init__.py", line 58, in <module>
from pandas.io.api import *
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/api.py", line 10, in <module>
from pandas.io.pytables import HDFStore, get_store, read_hdf
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/io/pytables.py", line 918
def append(self, key: object, value: object, format: object = None, append: object = True, columns: object = None,
^
SyntaxError: non-default argument follows default argument

Error after "from new import instancemethod" when importing scipy.stats

I am getting an exception from scipy whenever I try to import the nltk package. The command and the error looks like this:
>>> import nltk
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/nltk/__init__.py", line 114, in <module>
from nltk.collocations import *
File "/usr/local/lib/python2.7/dist-packages/nltk/collocations.py", line 39, in <module>
from nltk.metrics import ContingencyMeasures, BigramAssocMeasures, TrigramAssocMeasures
File "/usr/local/lib/python2.7/dist-packages/nltk/metrics/__init__.py", line 16, in <module>
from nltk.metrics.scores import (accuracy, precision, recall, f_measure,
File "/usr/local/lib/python2.7/dist-packages/nltk/metrics/scores.py", line 16, in <module>
from scipy.stats.stats import betai
File "/usr/local/lib/python2.7/dist-packages/scipy/stats/__init__.py", line 344, in <module>
from .stats import *
File "/usr/local/lib/python2.7/dist-packages/scipy/stats/stats.py", line 176, in <module>
from . import distributions
File "/usr/local/lib/python2.7/dist-packages/scipy/stats/distributions.py", line 10, in <module>
from ._distn_infrastructure import (entropy, rv_discrete, rv_continuous,
File "/usr/local/lib/python2.7/dist-packages/scipy/stats/_distn_infrastructure.py", line 43, in <module>
from new import instancemethod
File "new.py", line 107
return copy.deepcopy(self)
^
IndentationError: expected an indented block
I executed this command in a terminal (ubuntu 16.04 LTS system). I did not find anything about this error and the indentation doesn't look wrong.

The SyntaxError is in your file new.py (I guess it's in your current working directory). Try to switch to a directory where no new.py file is present (or move the new.py file in another directory), then the internal scipy import should work without problems.
On the other hand you can just upgrade to scipy 0.19.x. They removed the import there and it should work without problems.
Note that it's always a bad idea to name python files like builtin-modules! That's a common source for exceptions or unexpected behaviour.

ImportError when using scipy.io

So I am having a bit of trouble using scipy. I have been importing data from a .mat file (matlab variables) and up until today it has worked perfectly. I have no idea what changed or when because I have been developing a text - based data format so that I can avoid depending on Matlab for writing my data. Anyways, I am getting a bizzare import error when I import scipy.io
import scipy.io
myData = scipy.io.loadmat('some_data_file')
When I run this I get the following error:
>>> import scipy.io
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\pyzo2014a\lib\site-packages\scipy\io\__init__.py", line 85, in <module>
from .matlab import loadmat, savemat, whosmat, byteordercodes
File "C:\pyzo2014a\lib\site-packages\scipy\io\matlab\__init__.py", line 13, in <module>
from .mio import loadmat, savemat, whosmat
File "C:\pyzo2014a\lib\site-packages\scipy\io\matlab\mio.py", line 13, in <module>
from .mio4 import MatFile4Reader, MatFile4Writer
File "C:\pyzo2014a\lib\site-packages\scipy\io\matlab\mio4.py", line 11, in <module>
import scipy.sparse
File "C:\pyzo2014a\lib\site-packages\scipy\sparse\__init__.py", line 217, in <module>
from .csgraph import cs_graph_components
File "C:\pyzo2014a\lib\site-packages\scipy\sparse\csgraph\__init__.py", line 148, in <module>
from ._shortest_path import shortest_path, floyd_warshall, dijkstra,\
ImportError: No module named 'scipy.sparse.csgraph._shortest_path'
I thought there might be something wrong with my python distribution so I reinstalled it, however the problem persists, and now the installer says it can't find '_shortest_path.py' when it is installing. When I navigate to .../Libs/site-packages/scipy/sparse/csgraph/ I find that indeed there is no module named _shortest_path. I don't understand how this error came about or how anything in my code would change it. Has anyone else come across this problem?
I am using Pyzo 2014 on Windows 7 x64.

Restore shortest_path.pyd in your virust chest
http://www.blendernation.com/2014/06/28/getting-a-virus-warning-with-blender-2-71-heres-why/

importing NumPy in Parallel Python

everyone,I am new to PP but got stuck in a problem when importing NumPy with PP.
Basically what I tried to do was submitting a function to the ppserver which depends on NumPy. I have imported it at the very beginning of the code using (import NumPy as nu) but when I ran the code, it gave me the error that cannot find the shared object multiarray.so.
The situation is exactly the same here: parallel python forum
the code is attached as below: (I am running on python 2.7.2 + pp 1.6.0 + numpy 1.5.1)
import numpy as nu
import pylab as pl
import pp
job_server = pp.Server(secret="123456")
print "Starting pp with", job_server.get_ncpus(), "workers"
aa = GrRib()
job = job_server.submit(aa.plotwavefunc, (band,k),(nu,pl,signal))
result = job()
the error looks like :
An error has occured during the function import
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/ppworker.py", line 86, in run
exec __fobj
File "<string>", line 127, in <module>
ImportError: Error importing numpy: you should not try to import numpy from
its source directory; please exit the numpy source tree, and relaunch
your python intepreter from there.
An error has occured during the function import
Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/ppworker.py", line 86, in run
exec __fobj
File "<string>", line 1, in <module>
File "/usr/share/pyshared/matplotlib/__init__.py", line 135, in <module>
from matplotlib.rcsetup import (defaultParams,
File "/usr/share/pyshared/matplotlib/rcsetup.py", line 19, in <module>
from matplotlib.colors import is_color_like
File "/usr/share/pyshared/matplotlib/colors.py", line 52, in <module>
import numpy as np
File "/usr/share/pyshared/numpy/__init__.py", line 136, in <module>
import add_newdocs
File "/usr/share/pyshared/numpy/add_newdocs.py", line 9, in <module>
from numpy.lib import add_newdoc
File "/usr/share/pyshared/numpy/lib/__init__.py", line 4, in <module>
from type_check import *
File "/usr/share/pyshared/numpy/lib/type_check.py", line 8, in <module>
import numpy.core.numeric as _nx
File "/usr/share/pyshared/numpy/core/__init__.py", line 5, in <module>
import multiarray
ImportError: No module named multiarray
Can anyone help me out? I understand it as I will have to change the directory PP is looking for pyshared objects.

I could be wrong, but I believe the way you submit the job is wrong. As seen on the documentation (http://www.parallelpython.com/content/view/15/30/#QUICKSMP), the third argument (not including "self") are dependent functions. Also, the modules have to be strings. I'm assuming the "band" and "k" are dependent functions since I do not see their declarations:
job = job_server.submit(aa.plotwavefunc, depfuncs = (band,k), modules = ("numpy","pylab","signal"))