Fix linting errors, minor bugs and reorganise code

* Fix some linting errors and some minor bugs caught by the linter.
  Move the `random_string` function to separate module for use in multiple
  places in the code.

1 files changed, 11 insertions, 0 deletions

diff --git a/gn3/random.py b/gn3/random.py
new file mode 100644
index 0000000..f0ba574
--- /dev/null
+++ b/gn3/random.py
@@ -0,0 +1,11 @@
+"""
+Functions to generate complex random data.
+"""
+import random
+import string
+
+def random_string(length):
+    """Generate a random string of length `length`."""
+    return "".join(
+        random.choices(
+            string.ascii_letters + string.digits, k=length))