diff --git a/rwx/ps/__init__.py b/rwx/ps/__init__.py
index b66c21b..b2eca55 100644
--- a/rwx/ps/__init__.py
+++ b/rwx/ps/__init__.py
@@ -1,9 +1,12 @@
+"""Handle processes."""
+
 import subprocess
 
 from rwx import txt
 
 
-def get_tuples_args(tuples) -> list[str]:
+def get_tuples_args(*tuples: tuple[str]) -> list[str]:
+    """Turn arguments tuples into an arguments list."""
     args: list[str] = []
     for item in tuples:
         if type(item) is tuple:
@@ -13,18 +16,21 @@ def get_tuples_args(tuples) -> list[str]:
     return args
 
 
-def run(*tuples) -> subprocess.CompletedProcess:
+def run(*tuples: tuple[str]) -> subprocess.CompletedProcess:
+    """Run from a list of arguments tuples."""
     return subprocess.run(
         get_tuples_args(tuples), capture_output=False, check=True
     )
 
 
-def run_line(*tuples, charset: str = txt.CHARSET) -> str:
+def run_line(*tuples: tuple[str], charset: str = txt.CHARSET) -> str:
+    """Run and return output line."""
     lines = run_lines(*get_tuples_args(tuples), charset=charset)
     return lines[0]
 
 
-def run_lines(*tuples, charset: str = txt.CHARSET) -> list[str]:
+def run_lines(*tuples: tuple[str], charset: str = txt.CHARSET) -> list[str]:
+    """Run and return output lines."""
     process = subprocess.run(
         get_tuples_args(tuples), capture_output=True, check=True
     )