Upgrading pip removes pip, producing the classic Surprised Pikachu moment

Level 1: The Vanishing Repairman

Imagine you call a repairman to fix your sink. He says, "Before I can fix it, I need to upgrade my toolbox first." Fine — he upgrades the toolbox, gives you a thumbs up, and says "Success!" Then you ask him to fix the sink... and he has completely vanished. Not just unwilling — the phone company now claims no such repairman has ever existed. That's what happened here: the helper program asked to be updated, the update worked, and then the helper disappeared from the computer entirely. The shocked yellow Pikachu face is exactly the face you make when following the instructions perfectly is what broke everything.

Level 2: PATH, Shims, and the Disappearing Command

The cast of characters in this tragedy:

• pip: Python's package installer — pip install requests downloads and installs libraries from PyPI. It's how you get nearly everything in Python.
• python -m pip: runs pip as a module of a specific Python interpreter instead of as a standalone command. Recommended for upgrading pip, because it ties the operation to a known Python.
• PATH: the environment variable listing the directories your shell searches for commands. When you type pip, Bash walks PATH and runs the first match. If the upgrade moved pip's executable to a directory not on PATH — say ~/.local/bin — Bash honestly reports it can't find it, even though pip is alive and well three directories over.
• Command not found: Bash's way of saying "nothing named that in any PATH directory." It does not mean the software is gone; it usually means it's hiding.
• Virtual environment (venv): a per-project Python sandbox with its own pip. Inside one, this entire meme becomes impossible, which is why every senior dev's first question will be "were you in a venv?"

First-aid kit for when this happens to you: try python -m pip install package (bypassing the missing shim), check which pip and echo $PATH, and run hash -r. One of those almost always brings pip back from the dead.

Level 3: Compliance Was the Bug

Read the transcript above Pikachu's horrified face carefully, because the cruelty is procedural:

Me: pip install package Pip: pip needs to be updated. Me: python -m pip install --upgrade pip Pip: Success. Me: pip install package Bash: Command "pip" not found.

The user did everything right. They even used the blessed incantation — python -m pip rather than bare pip — which is the officially recommended way to upgrade pip on itself (it sidesteps the Windows problem of an executable rewriting itself while running). Pip said Success. And then the shell, with bureaucratic indifference, declared pip nonexistent. The meme is about a betrayal with a green checkmark on it, which is a very specific genre of pain: the failure that occurs inside a success.

Mechanically, veterans know the autopsy by heart. python -m pip runs whichever pip module belongs to whichever python is first on PATH — which is frequently not the interpreter that owns the pip shim the shell was finding. Common fatalities: the upgrade installs the new pip into ~/.local (user site-packages) while the old system-level pip script gets removed or orphaned; or python is Python 2 while pip pointed at Python 3, and the upgrade severs the entry-point script; or the shell has the old location cached in its hash table and a simple hash -r would have resurrected it — but nothing tells you that. The error message, Command "pip" not found, contains zero forensic information about which of these five worlds you're in.

This is why the meme doubles as an indictment of the era's Python packaging story writ large: a tooling ecosystem where the package manager itself is the most dangerous package to install. The standard hazing rituals — sudo pip salting the system Python, distro package managers and pip fighting over the same files, the pip/pip3 schism — all share the same root: multiple Python installations cohabiting one machine with no referee. The community's eventual consensus answer is sitting right there in the tags: a virtualenv would have saved you, by giving each project its own private interpreter and its own pip, hermetically sealed from the system. Every Python developer learns this lesson exactly once, usually at the precise moment captured in Pikachu's face.