I try to install pytorch with gpu and give me the following issue?

Aya_Elfatyany: <p>pip3 install torch torchvision torchaudio --index-url <a href="https://download.pytorch.org/whl/cu118" rel="noopener nofollow ugc">https://download.pytorch.org/whl/cu118</a><br>
Looking in indexes: <a href="https://download.pytorch.org/whl/cu118" rel="noopener nofollow ugc">https://download.pytorch.org/whl/cu118</a><br>
ERROR: Could not find a version that satisfies the requirement torch (from versions: none)<br>
ERROR: No matching distribution found for torch</p>

Mah_Neh: <aside class="onebox githubissue" data-onebox-src="https://github.com/pytorch/pytorch/issues/47354">
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      <a href="https://github.com/pytorch/pytorch/issues/47354" target="_blank" rel="noopener nofollow ugc">github.com/pytorch/pytorch</a>
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      <a href="https://github.com/pytorch/pytorch/issues/47354" target="_blank" rel="noopener nofollow ugc">ERROR: Could not find a version that satisfies the requirement torch==1.7.0+cpu</a>
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        opened <span class="discourse-local-date" data-format="ll" data-date="2020-11-04" data-time="12:45:43" data-timezone="UTC">12:45PM - 04 Nov 20 UTC</span>
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          closed <span class="discourse-local-date" data-format="ll" data-date="2020-11-04" data-time="22:22:18" data-timezone="UTC">10:22PM - 04 Nov 20 UTC</span>
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          triaged
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    <p class="github-body-container">## 🐛 Bug



## To Reproduce

Steps to reproduce the behavior:
```
[root@<span class="show-more-container"><a href="" rel="noopener" class="show-more">…</a></span><span class="excerpt hidden">ip-172-26-11-98 ~]# python3.9 -m pip install torch==1.7.0+cpu torchvision==0.8.1+cpu torchaudio==0.7.0 -f https://download.pytorch.org/whl/torch_stable.html
Looking in links: https://download.pytorch.org/whl/torch_stable.html
ERROR: Could not find a version that satisfies the requirement torch==1.7.0+cpu (from versions: 0.1.2, 0.1.2.post1, 0.1.2.post2)
ERROR: No matching distribution found for torch==1.7.0+cpu
```



## Expected behavior


Successful installation of torch

## Environment

 - PyTorch Version (e.g., 1.0): 1.7
 - OS (e.g., Linux): CentOS 7.8
 - How you installed PyTorch (`conda`, `pip`, source): pip
 - Build command you used (if compiling from source):
 - Python version: 3.9
 - CUDA/cuDNN version:
 - GPU models and configuration:
 - Any other relevant information: I had built Python3.9 from source.

## Additional context
I had built Python 3.9 this way:
```
yum install openssl-devel readline-devel libuuid-devel gdbm-devel sqlite-devel bzip bzip2-devel libffi-devel
wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz
tar -xzf Python-3.9.0.tgz
rm -rf Python-3.9.0.tgz
cd Python-3.9.0
mkdir build
cd build
../configure --sbindir=/usr/bin/python3.9
make
make install
```</span></p>
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<p>Please include if that link helps or what other information did you survey so that others can reuse this post as well.</p>