Skip to content

Commit 72f3829

Browse files
jvosslerjvossler
committed
PCC updates
1 parent ac79985 commit 72f3829

File tree

4 files changed

+201
-2
lines changed

4 files changed

+201
-2
lines changed

Diff for: ‎Ch_10/PCC_Ch-10_Notebook1.ipynb

+196
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,196 @@
1+
{
2+
"cells": [
3+
{
4+
"attachments": {},
5+
"cell_type": "markdown",
6+
"metadata": {},
7+
"source": [
8+
"# Ch. 10: Files and Exceptions"
9+
]
10+
},
11+
{
12+
"attachments": {},
13+
"cell_type": "markdown",
14+
"metadata": {},
15+
"source": [
16+
"Windows systems use a backslash (`\\`) instead of a forward slash (`/`) when displaying \n",
17+
"file paths, but you can still use forward slashes in your code."
18+
]
19+
},
20+
{
21+
"cell_type": "code",
22+
"execution_count": 4,
23+
"metadata": {},
24+
"outputs": [
25+
{
26+
"name": "stdout",
27+
"output_type": "stream",
28+
"text": [
29+
"3.1415926535\n",
30+
"8979323846\n",
31+
"2643383279\n"
32+
]
33+
}
34+
],
35+
"source": [
36+
"with open('python_work/pi_digits.txt') as file_object:\n",
37+
" contents = file_object.read()\n",
38+
"# Python’s rstrip() method removes, or strips, any whitespace characters \n",
39+
"# from the right side of a string.\n",
40+
"print(contents.rstrip())"
41+
]
42+
},
43+
{
44+
"cell_type": "code",
45+
"execution_count": 10,
46+
"metadata": {},
47+
"outputs": [
48+
{
49+
"name": "stdout",
50+
"output_type": "stream",
51+
"text": [
52+
"/home/voodoo/Projects/Repos/Python-Crash-Course/Ch_10/python_work/pi_digits.txt\n",
53+
"3.1415926535\n",
54+
"8979323846\n",
55+
"2643383279\n"
56+
]
57+
}
58+
],
59+
"source": [
60+
"file_path = '/home/voodoo/Projects/Repos/Python-Crash-Course/Ch_10/python_work/'\n",
61+
"file_name = 'pi_digits.txt'\n",
62+
"\n",
63+
"file = file_path + file_name\n",
64+
"\n",
65+
"print(file)\n",
66+
"\n",
67+
"with open(file, 'r') as file_object:\n",
68+
" contents = file_object.read()\n",
69+
"print(contents.rstrip())"
70+
]
71+
},
72+
{
73+
"attachments": {},
74+
"cell_type": "markdown",
75+
"metadata": {},
76+
"source": [
77+
"If you try to use backslashes in a file path, you’ll get an error because the backslash is \n",
78+
"used to escape characters in strings. For example, in the path \"C:\\path\\to\\file.txt\", \n",
79+
"the sequence \\t is interpreted as a tab. If you need to use backslashes, you can escape \n",
80+
"each one in the path, like this: \"C:\\\\path\\\\to\\\\file.txt\"."
81+
]
82+
},
83+
{
84+
"attachments": {},
85+
"cell_type": "markdown",
86+
"metadata": {},
87+
"source": [
88+
"#### Reading line by line"
89+
]
90+
},
91+
{
92+
"cell_type": "code",
93+
"execution_count": 12,
94+
"metadata": {},
95+
"outputs": [
96+
{
97+
"name": "stdout",
98+
"output_type": "stream",
99+
"text": [
100+
"3.1415926535\n",
101+
"8979323846\n",
102+
"2643383279\n"
103+
]
104+
}
105+
],
106+
"source": [
107+
"with open(file) as file_object:\n",
108+
" for line in file_object:\n",
109+
" print(line.rstrip())"
110+
]
111+
},
112+
{
113+
"attachments": {},
114+
"cell_type": "markdown",
115+
"metadata": {},
116+
"source": [
117+
"#### Making a List of Lines from a File"
118+
]
119+
},
120+
{
121+
"attachments": {},
122+
"cell_type": "markdown",
123+
"metadata": {},
124+
"source": [
125+
"If you want to retain access to a file’s contents outside the with block, you can store the file’s lines in a list inside the block and then work with that list. You can process parts of the file immediately and postpone some processing for later in the program.\n",
126+
"\n",
127+
"The readlines() method takes each line from the file and stores it in a list. This list is then assigned to lines, which we can continue to work with after the with block ends. At v we use a simple for loop to print each line from lines. Because each item in lines corresponds to each line in the file, the output matches the contents of the file exactly."
128+
]
129+
},
130+
{
131+
"cell_type": "code",
132+
"execution_count": 13,
133+
"metadata": {},
134+
"outputs": [
135+
{
136+
"name": "stdout",
137+
"output_type": "stream",
138+
"text": [
139+
"3.1415926535\n",
140+
"8979323846\n",
141+
"2643383279\n"
142+
]
143+
}
144+
],
145+
"source": [
146+
"with open(file) as file_object:\n",
147+
" lines = file_object.readlines()\n",
148+
"\n",
149+
"for line in lines:\n",
150+
" print(line.rstrip())"
151+
]
152+
},
153+
{
154+
"attachments": {},
155+
"cell_type": "markdown",
156+
"metadata": {},
157+
"source": [
158+
"## Left off on the bottom of pg.188"
159+
]
160+
},
161+
{
162+
"cell_type": "code",
163+
"execution_count": null,
164+
"metadata": {},
165+
"outputs": [],
166+
"source": []
167+
}
168+
],
169+
"metadata": {
170+
"kernelspec": {
171+
"display_name": "Python 3.8.10 64-bit",
172+
"language": "python",
173+
"name": "python3"
174+
},
175+
"language_info": {
176+
"codemirror_mode": {
177+
"name": "ipython",
178+
"version": 3
179+
},
180+
"file_extension": ".py",
181+
"mimetype": "text/x-python",
182+
"name": "python",
183+
"nbconvert_exporter": "python",
184+
"pygments_lexer": "ipython3",
185+
"version": "3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]"
186+
},
187+
"orig_nbformat": 4,
188+
"vscode": {
189+
"interpreter": {
190+
"hash": "916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1"
191+
}
192+
}
193+
},
194+
"nbformat": 4,
195+
"nbformat_minor": 2
196+
}

Diff for: ‎Ch_10/python_work/pi_digits.txt

+3
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,3 @@
1+
3.1415926535
2+
8979323846
3+
2643383279

Diff for: ‎Ch_7/PCC_Ch-7_Notebook1.ipynb

+1-1
Original file line numberDiff line numberDiff line change
@@ -1292,7 +1292,7 @@
12921292
"name": "python",
12931293
"nbconvert_exporter": "python",
12941294
"pygments_lexer": "ipython3",
1295-
"version": "3.10.6 (main, Nov 2 2022, 18:53:38) [GCC 11.3.0]"
1295+
"version": "3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]"
12961296
},
12971297
"orig_nbformat": 4,
12981298
"vscode": {

Diff for: ‎Ch_9/PCC_Ch-9_Notebook1.ipynb

+1-1
Original file line numberDiff line numberDiff line change
@@ -1750,7 +1750,7 @@
17501750
"name": "python",
17511751
"nbconvert_exporter": "python",
17521752
"pygments_lexer": "ipython3",
1753-
"version": "3.10.6 (main, Nov 2 2022, 18:53:38) [GCC 11.3.0]"
1753+
"version": "3.10.6 (main, Nov 14 2022, 16:10:14) [GCC 11.3.0]"
17541754
},
17551755
"orig_nbformat": 4,
17561756
"vscode": {

0 commit comments

Comments
 (0)