bites 163

Author: [email protected]

.gitignore

@@ -59,3 +59,6 @@
 /258-pandas/README.md
 /132/README.md
 /257/README.md
+/163/README.md
+/Pipfile
+/Pipfile.lock

163/reqs.py

@@ -0,0 +1,30 @@
+from operator import methodcaller
+from packaging import version
+
+def changed_dependencies(old_reqs: str, new_reqs: str) -> list:
+    """Compare old vs new requirement multiline strings
+       and return a list of dependencies that have been upgraded
+       (have a newer version)
+    """
+    oldreqslines = old_reqs.split()
+    newreqslines = new_reqs.split()
+    oldreqs = {entry[0]: entry[1] for entry in map(methodcaller("split", "=="), oldreqslines)}
+    newreqs = {entry[0]: entry[1] for entry in map(methodcaller("split", "=="), newreqslines)}
+    upgradereqs = [entry[0] for entry in newreqs.items()
+                   if version.parse(entry[1]) > version.parse(oldreqs[entry[0]])]
+    return upgradereqs
+
+
+other_old_reqs = """
+twilio==6.23.1
+urllib3==1.21.1
+Werkzeug==0.12.1
+WTForms==1.19.0
+"""
+other_new_reqs = """
+twilio==6.3.0
+urllib3==1.21.1
+Werkzeug==0.14.1
+WTForms==2.1
+"""
+changed_dependencies(other_old_reqs, other_new_reqs)

163/test_reqs.py

@@ -0,0 +1,41 @@
+from reqs import changed_dependencies
+
+# version might be fictitious for testing purposes
+old_reqs = """
+certifi==2017.4.17
+chardet==3.0.4
+click==6.7
+Faker==0.7.12
+Flask==0.12.1
+"""
+new_reqs = """
+certifi==2016.11.29
+chardet==2.0.4
+click==5.0
+Faker==1.0.2
+Flask==1.0.2
+"""
+other_old_reqs = """
+twilio==6.23.1
+urllib3==1.21.1
+Werkzeug==0.12.1
+WTForms==1.19.0
+"""
+other_new_reqs = """
+twilio==6.3.0
+urllib3==1.21.1
+Werkzeug==0.14.1
+WTForms==2.1
+"""
+
+
+def test_changed_dependencies_old_vs_new():
+    actual = changed_dependencies(old_reqs, new_reqs)
+    expected = ['Faker', 'Flask']
+    assert sorted(actual) == expected
+
+
+def test_changed_dependencies_other_data():
+    actual = changed_dependencies(other_old_reqs, other_new_reqs)
+    expected = ['WTForms', 'Werkzeug']
+    assert sorted(actual) == expected