with open("story.txt", "w") as f:    f.write("Learn Python At SQA Tools\n") with open("story.txt") as f:    print(sum(ch.islower() for ch in f.read()))

14

with open("story.txt", "w") as f:    f.write("Learn Python At SQA Tools\n") with open("story.txt") as f:    print(sum(ch.isupper() for ch in f.read()))

7

with open("story.txt", "w") as f:    f.write("Python is fun\nTry it\n") with open("story.txt") as f:    text = f.read()print("All characters:", len(text))print("Without whitespace:", sum(1 for ch in text if not ch.isspace()))

All characters: 21
Without whitespace: 16

with open("part1.txt", "w") as f:    f.write("Hello from part 1\n")with open("part2.txt", "w") as f:    f.write("Hello from part 2\n") with open("merged.txt", "w") as out:    for name in ["part1.txt", "part2.txt"]:        with open(name) as f:            out.write(f.read())print(open("merged.txt").read())

Hello from part 1
Hello from part 2

with open("word.txt", "w") as f:    f.write("sqa tools\npy\n") with open("word.txt") as f:    print([ch for ch in f.read() if not ch.isspace()])

['s', 'q', 'a', 't', 'o', 'o', 'l', 's', 'p', 'y']

f = open("temp.txt", "w")print(f.closed)f.close()print(f.closed) with open("temp.txt") as g:    print("inside with:", g.closed)print("after with:", g.closed)

False
True
inside with: False
after with: True

data = (12, 45, 78)with open("tuple.txt", "w") as f:    f.write("\n".join(map(str, data))) with open("tuple.txt") as f:    loaded = tuple(int(line) for line in f)print(loaded, loaded == data)

(12, 45, 78) True

import os with open("data.bin", "wb") as f:    f.write(b"x" * 1500) print(os.path.getsize("data.bin"), "bytes")

1500 bytes

with open("story.txt", "w") as f:    f.write("a\nb\nc\nd\n") with open("story.txt") as f:    print(sum(1 for _ in f))

4

import difflibimport filecmp with open("a.txt", "w") as f:    f.write("line one\nline two\nline three\n")with open("b.txt", "w") as f:    f.write("line one\nline 2\nline three\n") print("Same:", filecmp.cmp("a.txt", "b.txt", shallow=False))with open("a.txt") as a, open("b.txt") as b:    for line in difflib.unified_diff(a.readlines(), b.readlines(), "a.txt", "b.txt", n=0):        print(line.rstrip("\n"))

Same: False
--- a.txt
+++ b.txt
@@ -2 +2 @@
-line two
+line 2