added helpers

opt/cs50/lib/help50/make

@@ -22,18 +22,18 @@ if [[ "$output" =~ $regex ]]; then
 
 fi
 
-regex="No rule to make target '(.*)'"
+regex="make: \*\*\* No rule to make target '(.*)'"
 if [[ "$output" =~ $regex ]]; then
 
     # If no .c file for target
-    c="${BASH_REMATCH[1]}.c"
-    if [[ ! -f "$c" ]]; then
+    file="${BASH_REMATCH[1]}.c"
+    if [[ ! -f "$file" ]]; then
 
         # Search recursively for .c file
-        path=$(_search "$c")
-        echo -n "There isn't a file called \`${c}\` in your current directory. You are in \`$(basename "$PWD")\`."
-        if [[ ! -z "$path" ]]; then
-            echo " Did you mean to \`cd $path\` first?"
+        dir=$(_search "$file")
+        echo -n "There isn't a file called \`$file\` in your current directory."
+        if [[ ! -z "$dir" ]]; then
+            echo " Did you mean to \`cd $dir\` first?"
         else
             echo
         fi

opt/cs50/lib/help50/python

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+output=$(cat)
+
+regex="AttributeError: module 'cs50' has no attribute '(get_(float|int|string)|SQL)'$"
+if [[ "$output" =~ $regex ]]; then
+    if [[ -f cs50.py ]]; then
+        echo "You have a file called \`cs50.py\` that is \"shadowing\" CS50's own. Best to rename that file with \`mv\`."
+        exit
+    fi
+fi
+
+regex='^\s*(import string\s*$|from\s+string\s+import\s+)'
+if echo "$output" | grep -Pq "$regex"; then
+    if [[ -f string.py ]]; then
+        echo "You have a file called \`string.py\` that is \"shadowing\" Python's own. Best to rename that file with \`mv\`."
+        exit
+    fi
+fi
+
+regex="python: can't open file '(.*\.py)': \[Errno 2\] No such file or directory"
+if [[ "$output" =~ $regex ]]; then
+
+    # Relative path from $PWD
+    path=$(realpath --relative-to=. "${BASH_REMATCH[1]}")
+
+    # If .py is in $PWD
+    if [[ -n "$path" && "$path" == $(basename "$path") ]]; then
+        dir=$(_search "$path")
+        echo -n "There isn't a file called \`$path\` in your current directory."
+        if [[ ! -z "$dir" ]]; then
+            echo " Did you mean to \`cd $dir\` first?"
+        else
+            echo
+        fi
+        exit
+    fi
+fi