无法在Jupyter Notebook单元中打印bash变量

Question

I am trying to combine Python and bash commands in one Jupyter notebook shell but only python variables are working but not the bash commands using those python variables. Here is an example

username="test_username"
password = getpass.getpass(prompt='Enter your password: ')
!echo "$username"
!echo "$password"
!AUTH_HEADER=$(curl -su "$username":"$password" "https://de.cyverse.org/terrain/token" | jq -r .access_token)
!export AUTH_HEADER
!echo "$AUTH_HEADER"

When I tried to execute this in Jupyter notebook cell, this is what I see with an empty blank line for AUTH_HEADER variable.

Enter your password:  ·············
test_username
test123

I also able to echo username and password but not the AUTH_HEADER . I don't understand what I am doing wrong here. Any help is appreciated.

Answer 1

I suppose each run off shell command !cmd starts a new bash instance. Thus the variable AUTH_HEADER is not shared between bash instances. Try run cell with bash and run your script there like below

%bash
AUTH_HEADER=$(curl -su "$username":"$password"  "https://de.cyverse.org/terrain/token" | jq -r .access_token)
export AUTH_HEADER
echo "$AUTH_HEADER"