cannot have space in input values

[sonalgupta]

3x define input 'algo' 'bubble Sort'
gives an error
input/algo=/bubble Sort: Invalid character in pattern value bubble Sort for algo.

It's quite a restriction to have only alpha numeric characters in the input values, unless I am missing some way to have input values with space/comma.

[netj]

No you can't use space in values as the error says. Disallowing space and special characters is a design decision made to be friendly to the underlying filesystem and rest of the parts. You can set any data to a variable in env, e.g., label="bubble Sort" if you absolutely need to keep track of arbitrary strings associated to that value.