Update python command in linux

Author: JSAbrahams

.travis.yml

@@ -42,16 +42,16 @@ before_script:
 
 before_install:
   # Python
+  - python3 --version
   - |
     if [ $TRAVIS_OS_NAME = 'linux' ]; then
       sudo apt update;
       sudo apt install software-properties-common;
       sudo add-apt-repository -y ppa:deadsnakes/ppa;
       sudo apt-get update;
       sudo apt-get install python3.8;
-      sudo update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8;
-      sudo update-alternatives --config python3;
     fi
+  - python3 --version
 
   # grcov
   - curl -L https://github.com/mozilla/grcov/releases/download/v0.4.1/grcov-linux-x86_64.tar.bz2 | tar jxf -

tests/output/common.rs

@@ -1,5 +1,5 @@
 #[cfg(target_os = "linux")]
-pub static PYTHON: &str = "python3";
+pub static PYTHON: &str = "python3.8";
 #[cfg(target_os = "macos")]
 pub static PYTHON: &str = "python3";
 #[cfg(target_os = "windows")]