function/class synatax

python/ql/src/Classes/NamingConventionsClasses.qhelp

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+<!DOCTYPE qhelp PUBLIC
+  "-//Semmle//qhelp//EN"
+  "qhelp.dtd">
+<qhelp>
+
+
+<overview>
+<p>A class name that begins with a lowercase letter does not follow standard
+naming conventions. This decreases code readability. For example, <code>class background</code>.
+</p>
+
+</overview>
+<recommendation>
+
+<p>
+Write the class name beginning with an uppercase letter. For example, <code>class Background</code>.
+</p>
+
+</recommendation>
+
+<references>
+
+<li>
+  Guido van Rossum, Barry Warsaw, Nick Coghlan <em>PEP 8 -- Style Guide for Python Code<em>
+  <a href="https://www.python.org/dev/peps/pep-0008/#class-names"</a>
+</li>
+
+</references>
+
+</qhelp>

python/ql/src/Classes/NamingConventionsClasses.ql

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+/**
+ * @name Misnamed class
+ * @description A class name that begins with a lowercase letter decreases readability.
+ * @kind problem
+ * @problem.severity recommendation
+ * @precision medium
+ * @id python/misnamed-type
+ * @tags maintainability
+ */
+
+import python
+
+from Class c
+where
+  c.inSource() and
+  not c.getName().substring(0, 1).toUpperCase() = c.getName().substring(0, 1)
+select c, "Class names should start in uppercase."

python/ql/src/Functions/NamingConventionsFunctions.qhelp

@@ -0,0 +1,30 @@
+<!DOCTYPE qhelp PUBLIC
+  "-//Semmle//qhelp//EN"
+  "qhelp.dtd">
+<qhelp>
+
+
+<overview>
+<p>A function name that begins with an uppercase letter does not follow standard
+naming conventions. This decreases code readability. For example, <code>Jump</code>.
+</p>
+
+</overview>
+<recommendation>
+
+<p>
+Write the function name beginning with an lowercase letter. For example, <code>jump</code>.
+</p>
+
+</recommendation>
+
+<references>
+
+<li>
+  Guido van Rossum, Barry Warsaw, Nick Coghlan <em>PEP 8 -- Style Guide for Python Code<em>
+  <a href="https://www.python.org/dev/peps/pep-0008/#function-and-variable-names"</a>
+</li>
+
+</references>
+
+</qhelp>

python/ql/src/Functions/NamingConventionsFunctions.ql

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+/**
+ * @name Misnamed function
+ * @description A function name that begins with an uppercase letter decreases readability.
+ * @kind problem
+ * @problem.severity recommendation
+ * @precision medium
+ * @id python/misnamed-function
+ * @tags maintainability
+ */
+
+import python
+
+from Function f
+where
+  f.inSource() and
+  not f.getName().substring(0, 1).toLowerCase() = f.getName().substring(0, 1)
+select f, "Function names should start in lowercase."

python/ql/test/query-tests/Classes/Naming/NamingConventionsClasses.expected

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+| NamingConventionsClasses.py:2:1:2:14 | Class badName | Class names should start in uppercase. |

python/ql/test/query-tests/Classes/Naming/NamingConventionsClasses.py

@@ -0,0 +1,11 @@
+# BAD, do not start class or interface name with lowercase letter
+class badName:
+
+    def hello(self):
+        print("hello")
+
+# Good, class name starts with capital letter
+class GoodName:
+
+    def hello(self):
+        print("hello")

python/ql/test/query-tests/Classes/Naming/NamingConventionsClasses.qlref

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+Classes/NamingConventionsClasses.ql

python/ql/test/query-tests/Functions/general/NamingConventionsFunctions.expected

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+| NamingConventionsFunctions.py:4:5:4:25 | Function HelloWorld | Function names should start in lowercase. |

python/ql/test/query-tests/Functions/general/NamingConventionsFunctions.py

@@ -0,0 +1,9 @@
+class Test:
+
+    # BAD, do not start function name with uppercase letter
+    def HelloWorld(self):
+        print("hello world")
+
+    # GOOD, function name starts with lowercase letter
+    def hello_world(self):
+        print("hello world")

python/ql/test/query-tests/Functions/general/NamingConventionsFunctions.qlref

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+Functions/NamingConventionsFunctions.ql