diff --git a/README.md b/README.md
index 8a4bb95..f3cdcfa 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,11 @@
-pylib
-=====
+# Install
+
+Install in "development mode" so any changes of the program is effective.
+
+    git clone http://weseng.de/daniel/pylib.git
+    cd pylib
+    pip install --user -e .
+
+# Uninstall
+
+    pip uninstall pylib
diff --git a/pylib/__init__.py b/pylib/__init__.py
deleted file mode 100644
index e946c39..0000000
--- a/pylib/__init__.py
+++ /dev/null
@@ -1,13 +0,0 @@
-import os
-import sys
-
-# Add vendor directory to module search path
-project_dir = os.path.abspath(os.path.dirname(__file__))
-parent_dir = os.path.dirname(project_dir)
-vendor_dir = os.path.join(parent_dir, 'vendor')
-
-if vendor_dir not in sys.path:
-  sys.path.append(vendor_dir)
-
-# Now you can import any library located in the "vendor" folder!
-# import drawille
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..851dd6b
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+from os.path import join, dirname
+from setuptools import setup, find_packages
+
+# Utility function to read the README file. Used for the long_description.
+def read(fname):
+  with open(join(dirname(__file__), fname)) as fh:
+    return fh.read()
+
+setup(
+  name="pylib",
+  version="2021.02.01",
+  description="python library",
+  long_description=read("README.md"),
+  author="Daniel Weschke",
+  author_email="daniel.weschke@directbox.de",
+  package_dir={'': 'src'},
+  packages=find_packages("src"),
+  keywords = ['data', 'date', 'draw', 'geometry', 'mathematics', 'numerical', 'time'],
+  license="MIT",
+  classifiers=[
+    'Environment :: Console',
+    'Intended Audience :: Education',
+    'Intended Audience :: End Users/Desktop',
+    'Intended Audience :: Developers',
+    'Intended Audience :: Science/Research',
+    'License :: OSI Approved :: MIT License',
+    'Natural Language :: English',
+    'Operating System :: OS Independent',
+    'Programming Language :: Python',
+    'Topic :: Scientific/Engineering',
+    'Topic :: Scientific/Engineering :: Physics'
+  ]
+)
diff --git a/src/pylib/__init__.py b/src/pylib/__init__.py
new file mode 100644
index 0000000..e71b082
--- /dev/null
+++ b/src/pylib/__init__.py
@@ -0,0 +1,13 @@
+import os
+import sys
+
+# Add vendor directory to module search path
+_project_dir = os.path.abspath(os.path.dirname(__file__))
+_parent_dir = os.path.dirname(_project_dir)
+_vendor_dir = os.path.join(_parent_dir, 'vendor')
+
+if _vendor_dir not in sys.path:
+  sys.path.append(_vendor_dir)
+
+# Now you can import any library located in the "vendor" folder!
+# import drawille
diff --git a/pylib/data.py b/src/pylib/data.py
similarity index 100%
rename from pylib/data.py
rename to src/pylib/data.py
diff --git a/pylib/data_step.py b/src/pylib/data_step.py
similarity index 100%
rename from pylib/data_step.py
rename to src/pylib/data_step.py
diff --git a/pylib/data_step_std.py b/src/pylib/data_step_std.py
similarity index 100%
rename from pylib/data_step_std.py
rename to src/pylib/data_step_std.py
diff --git a/pylib/date.py b/src/pylib/date.py
similarity index 100%
rename from pylib/date.py
rename to src/pylib/date.py
diff --git a/pylib/drawblock.py b/src/pylib/drawblock.py
similarity index 100%
rename from pylib/drawblock.py
rename to src/pylib/drawblock.py
diff --git a/pylib/function.py b/src/pylib/function.py
similarity index 100%
rename from pylib/function.py
rename to src/pylib/function.py
diff --git a/pylib/geometry.py b/src/pylib/geometry.py
similarity index 100%
rename from pylib/geometry.py
rename to src/pylib/geometry.py
diff --git a/pylib/geometry2d.py b/src/pylib/geometry2d.py
similarity index 100%
rename from pylib/geometry2d.py
rename to src/pylib/geometry2d.py
diff --git a/pylib/geometry2d_plot.py b/src/pylib/geometry2d_plot.py
similarity index 100%
rename from pylib/geometry2d_plot.py
rename to src/pylib/geometry2d_plot.py
diff --git a/pylib/geometry_plot.py b/src/pylib/geometry_plot.py
similarity index 100%
rename from pylib/geometry_plot.py
rename to src/pylib/geometry_plot.py
diff --git a/pylib/geometry_plot_pylab.py b/src/pylib/geometry_plot_pylab.py
similarity index 100%
rename from pylib/geometry_plot_pylab.py
rename to src/pylib/geometry_plot_pylab.py
diff --git a/pylib/helper.py b/src/pylib/helper.py
similarity index 100%
rename from pylib/helper.py
rename to src/pylib/helper.py
diff --git a/pylib/mathematics.py b/src/pylib/mathematics.py
similarity index 100%
rename from pylib/mathematics.py
rename to src/pylib/mathematics.py
diff --git a/pylib/numerical/__init__.py b/src/pylib/numerical/__init__.py
similarity index 100%
rename from pylib/numerical/__init__.py
rename to src/pylib/numerical/__init__.py
diff --git a/pylib/numerical/fit.py b/src/pylib/numerical/fit.py
similarity index 100%
rename from pylib/numerical/fit.py
rename to src/pylib/numerical/fit.py
diff --git a/pylib/numerical/integration.py b/src/pylib/numerical/integration.py
similarity index 100%
rename from pylib/numerical/integration.py
rename to src/pylib/numerical/integration.py
diff --git a/pylib/numerical/ode.py b/src/pylib/numerical/ode.py
similarity index 100%
rename from pylib/numerical/ode.py
rename to src/pylib/numerical/ode.py
diff --git a/pylib/numerical/ode_model.py b/src/pylib/numerical/ode_model.py
similarity index 100%
rename from pylib/numerical/ode_model.py
rename to src/pylib/numerical/ode_model.py
diff --git a/pylib/time_of_day.py b/src/pylib/time_of_day.py
similarity index 100%
rename from pylib/time_of_day.py
rename to src/pylib/time_of_day.py
diff --git a/pylib/tui.py b/src/pylib/tui.py
similarity index 100%
rename from pylib/tui.py
rename to src/pylib/tui.py
diff --git a/vendor/drawille.py b/src/vendor/drawille.py
similarity index 100%
rename from vendor/drawille.py
rename to src/vendor/drawille.py