Rev Complement DNA + string insensitivity

bootcamp/contrib/student_02.py

@@ -0,0 +1,19 @@
+def get_complement(string):
+    """Reverse complements the DNA string input
+
+    Parameters
+    ----------
+    string : str
+        The DNA string to reverse complement
+
+    Returns
+    -------
+    string_reverse
+        The reverse complement of the DNA string
+
+    """
+    string = string.upper()
+    rev_dna = string[::-1]
+    dna_dict = {"A": "T", "G": "C", "C": "G", "T": "A"}
+    string_reverse = ''.join([dna_dict[x] for x in rev_dna if x in dna_dict])
+    return string_reverse

bootcamp/core/student_02.py

@@ -15,6 +15,8 @@ def count_substring(string, substring):
 
     """
     count = 0
+    string = string.upper()
+    substring = substring.upper()
 
     string_length = len(string)
     substring_length = len(substring)

bootcamp/core/tests/test_student_02.py

@@ -26,3 +26,11 @@ def test_count_substring_none():
     expected_count = 0
     observed_count = count_substring(test_string, test_substring)
     assert expected_count == observed_count
+
+
+def test_count_substring_case_insensitive():
+    test_string = "AGCTAGCAGT"
+    test_substring = "agC"
+    expected_count = 2
+    observed_count = count_substring(test_string, test_substring)
+    assert expected_count == observed_count