I get an error when I try to raise Python to 3 series using pyenv on Catalina

 Here, the first error
 error contents
>zipimport.ZipImportError: can't decompress data; zlib not available
make: *** [install] Error 1

 Because it came out

```$ brew install zlib```
 However, there is no particular change.

https://qiita.com/miyacomaru/items/a105800f938de7b908e0
 With reference to
```$ xcode-select --install```
 I did,
 > This software is currently not available from the software update server and cannot be installed.

 Will be alerted.

https://qiita.com/kuzira_vimmer/items/6b017896f9b44ae9f5c3
 I solved it by manually installing Command Line Tools from the page below with reference to this. (Dev account required? Is it OK to log in with an Apple ID? I had a Dev account, so I don't know which one)

https://developer.apple.com/download/more/

# I was able to install it! Next, "set to always use 3 series (3.6.5 in my case)"

 First, check the version

```$ pyenv versions```
 Confirm that pyenv is 3.6.5
```$ python --version```
 Then, 2.7.

## init pyenv
```$ pyenv init```
 Then

```# load pyenv automatically by appending```

#### **`python`**
```# the following to ~/.bash_profile

```eval "$(pyenv init -)"```

 Will come out, so


#### **`$ echo 'eval "$(pyenv init -)"' >> ~/.bash_profile`**

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