Its shows error in import pdfkit in python

I am Using python3 for coding in Ubuntu... I have already installed pip

sudo apt install python3-pip

Version

pip3 --version

Output

pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)

Install wkhtmltopdf:

sudo apt-get install wkhtmltopdf

wkhtmltopdf version output

wkhtmltopdf 0.12.4

Installing pdfkit

 pip install pdfkit

when i use pdfkit sample in pycharm

 import pdfkit
pdfkit.from_url(' 'out.pdf')
pdfkit.from_file('test.html', 'out.pdf')
pdfkit.from_string('Hello!', 'out.pdf')

is shows

/home/user/PycharmProjects/pythonProject/venv/bin/python "/home/user/PycharmProjects/sample project/venv/pipSample.py"
Traceback (most recent call last): File "/home/user/PycharmProjects/sample project/venv/pipSample.py", line 1, in <module> import pdfkit
ModuleNotFoundError: No module named 'pdfkit'
Process finished with exit code 1

I want a reply guys please...

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