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Python 3 cannot import socket in CMD but available in IDLE

I have installed python 3.7 on my computer. It seems not possible to import socket in CMD:
C:\Users\Sina\py
Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:06:47) [MSC v.1914 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python37-32\lib\socket.py", line 49, in <module>
import _socket
ImportError: Module use of python27.dll conflicts with this version of
Python.
>>>
But surprisingly, I am able to import socket in IDLE (Python 3.7).
I searched but didn't find any 'python27.dll' file in the installation directory
of python 3.7 (C:\Python37-32)
EDIT: There was a _socket.pyd file at "C:\Users\Sina" which used to make the confliction. I deleted it and the problem got fixed. Thanks to Aran-Fey!

no module named matplotlib on windows

Facing this issue right now, saw the question:
no module named pylab on windows
I have annaconda and python 2.7 installed. I tried in the python shell:
Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec 5 2015, 20:32:19) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named matplotlib
and received the following result. I've checked my PATH variable, and I'm not sure how to resolve.
Thanks in advance.

“ImportError: No module named scipy” after installing the scipy package

I need help with the scipy Python module. I installed it, but when I try to import it, I get an error (no module named scipy). Why?
Here's the output from my Python interpreter:
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> import scipy
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import scipy
ImportError: No module named scipy

Importing dlls work from python interpreter but not from script file

I am suing CPython 2.7 and have installed Python for NET clr package. I DO NOT want to use Iron Python.
When I run the python from MING32 command line it works:
PC#User /c/Users
$ python
Python 2.7.8 (default, Jun 30 2014, 16:03:49) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import clr
>>> clr.AddReference(r"C:\Users\MasterEmulator")
<System.Reflection.RuntimeAssembly object at 0x02368F30>
Howeever if I executed th same code from python script it fails:
PC#User /c/Users
$ cat s.py
import clr
clr.AddReference(r"C:\Users\MasterEmulator")
PC#User /c/Users
$ python s.py
Traceback (most recent call last):
File "s.py", line 2, in <module>
clr.AddReference(r"C:\Users\MasterEmulator")
System.IO.FileNotFoundException: Unable to find assembly 'C:\Users\MasterEmulator'.
at Python.Runtime.CLRModule.AddReference(String name)
What am I doing wrong here?
EDIT: This script however works. Seems so problem with absolute paths...
import clr
clr.AddReference(r"../Users/MasterEmulator")

How to use a C# dll in IronPython
sys.path.append(r"C:\Folder\Subfolder") # path of dll
clr.AddReference ("Ipytest.dll") # the dll

PyQt4.QtGui causes DLL Load Error with Python 2.7.5

PyQt4 seems to work fine on Python 2.7.5 running on Windows 8 64bit until now. Using the interactive shell via cmd:
Python 2.7.5 (default, May 15 2013, 22:43:36) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from PyQt4.QtGui import *
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: DLL load failed: %1 is not a valid Win32 application.
Question: What is causing this issue all of a sudden?