Is your device jailbroken? Some jailbreak "hiding" tools can cause this issue with Pythonista. If you have one, try disabling it and see if that helps - Pythonista works fine on jailbroken devices in general. (Note: I don't have a jailbreak myself, I'm basically repeating what other people have said in the past.)
Welcome!
This is the community forum for my apps Pythonista and Editorial.
For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.