First Examples

Author: Guilherme Diego

cap1/.problem4.py.swp

@@ -0,0 +1,9 @@
+grades = (1, 2, 3, 4, 5, 6, 7, 8, 9)
+
+def drop_first_n_last(grades):
+    first, *middle, last = grades
+    return sum(middle) / len(middle)
+
+result = drop_first_n_last(grades)
+print(result)
+

cap1/problem1.py

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+def create_values():
+    sales_record = [155, 182, 192, 220, 320, 110, 166, 185, 190]
+    *traiding_qtr, current_qtr = sales_record
+    middle_qtr = sum(traiding_qtr) / len(traiding_qtr)
+    print(middle_qtr, current_qtr)
+
+create_values()

cap1/problem2.py

@@ -0,0 +1,18 @@
+records = [
+    ('foo', 1, 2),
+    ('bar', 'hello'),
+    ('foo', 3, 4),
+]
+
+def do_foo(x, y):
+    print('foo', x, y)
+
+def do_bar(s):
+    print('bar', s)
+
+for tag, *args in records:
+    if tag == 'foo':
+        do_foo(*args)
+    elif tag == 'bar':
+        do_bar(*args)
+

cap1/problem3.py

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+from collections import deque
+
+def search(lines, pattern, history=5):
+    previous_lines = deque(maxlen=history)
+    import pdb; pdb.set_trace()
+    for line in lines:
+        if pattern in line:
+            yield line, previous_lines
+        previous_lines.append(line)
+
+if __name__ == '__main__':
+    with open('somefile.txt') as f:
+        results = search(f, 'python', 5)
+        import pdb; pdb.set_trace()
+        for line, prevlines in results:
+            for pline in prevlines:
+                print(pline, end='')
+            print(line, end='')
+            print('-' * 20)

cap1/problem4.py

@@ -0,0 +1,12 @@
+Go
+Pascal
+PHP
+R
+Java
+Javascript
+Ruby
+C++
+python
+C
+C#
+Fortran