Merge pull request #30 from cs50/SIGINT

get_string now exits program on SIGINT a la a C program

setup.py

@@ -16,5 +16,5 @@
     package_dir={"": "src"},
     packages=["cs50"],
     url="https://github.com/cs50/python-cs50",
-    version="2.1.1"
+    version="2.2.0"
 )

src/cs50/cs50.py

@@ -117,7 +117,8 @@ def get_string(prompt=None):
     Read a line of text from standard input and return it as a string,
     sans trailing line ending. Supports CR (\r), LF (\n), and CRLF (\r\n)
     as line endings. If user inputs only a line ending, returns "", not None.
-    Returns None upon error or no input whatsoever (i.e., just EOF).
+    Returns None upon error or no input whatsoever (i.e., just EOF). Exits
+    from Python altogether on SIGINT.
     """
     try:
         if prompt is not None:
@@ -126,5 +127,7 @@ def get_string(prompt=None):
         if not s:
             return None
         return re.sub(r"(?:\r|\r\n|\n)$", "", s)
+    except KeyboardInterrupt:
+        sys.exit("")
     except ValueError:
         return None

tests/python2.py

@@ -1,3 +1,7 @@
+import sys
+
+sys.path.insert(0, "../src")
+
 import cs50
 
 l = cs50.get_long()

tests/python3.py

@@ -1,3 +1,7 @@
+import sys
+
+sys.path.insert(0, "../src")
+
 import cs50
 
 i = cs50.get_int()

tests/sqltests.py

@@ -3,6 +3,8 @@
 import unittest
 import warnings
 
+sys.path.insert(0, "../src")
+
 from cs50.sql import SQL
 
 class SQLTests(unittest.TestCase):