text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
the columns are called my code just | 4,301.28 | 4.2 |
keeps working and so it keeps getting if | 4,303.679 | 4.201 |
you will better and better | 4,305.48 | 5.699 |
any questions now on this approach yeah | 4,307.88 | 6 |
what is the importance of online CSV | 4,311.179 | 4.321 |
file what's the importance of the new | 4,313.88 | 3.96 |
line in the CSV file it's partly a | 4,315.5 | 4.38 |
convention in the world of text files we | 4,317.84 | 3.839 |
humans have just been for decades in the | 4,319.88 | 5.22 |
habit of storing data line by line it's | 4,321.679 | 6.06 |
visually convenient it's just easy to | 4,325.1 | 4.32 |
extract from the file because you just | 4,327.739 | 3.721 |
look for the new lines so the new line | 4,329.42 | 5.04 |
just separates some data from some other | 4,331.46 | 5.58 |
data we could use any other symbol on | 4,334.46 | 4.56 |
the keyboard but it's just common to hit | 4,337.04 | 3.84 |
enter to just move the data to the next | 4,339.02 | 3.659 |
line just a convention | 4,340.88 | 4.26 |
other questions it seems to be working | 4,342.679 | 5.52 |
fine if you just have name and home I'm | 4,345.14 | 5.28 |
wondering what will happen if you want | 4,348.199 | 5.46 |
to put in more data | 4,350.42 | 4.2 |
um | 4,353.659 | 4.441 |
say you wanted to add a house to both | 4,354.62 | 5.64 |
the name and the home | 4,358.1 | 4.079 |
sure if you wanted to add the house back | 4,360.26 | 3.899 |
so if I go in here and add house last | 4,362.179 | 5.221 |
and I go here and say uh Gryffindor for | 4,364.159 | 6.901 |
Harry Gryffindor for Ron and Slytherin | 4,367.4 | 6.54 |
for Draco now I have three columns | 4,371.06 | 4.619 |
effectively if you will home on the left | 4,373.94 | 4.02 |
name in the middle house on the right | 4,375.679 | 4.621 |
each separated by commas with weird | 4,377.96 | 4.199 |
things like number four comma privet | 4,380.3 | 4.32 |
Drive still quoted notice if I go back | 4,382.159 | 4.441 |
to students.pi and I don't change the | 4,384.62 | 4.32 |
code at all and run python of | 4,386.6 | 5.04 |
students.pi it still just works and this | 4,388.94 | 4.56 |
is what's so powerful about a dictionary | 4,391.64 | 4.38 |
reader it can change over time it can | 4,393.5 | 4.98 |
have more and more columns your existing | 4,396.02 | 4.86 |
code is not going to break your code | 4,398.48 | 4.259 |
would break would be much more fragile | 4,400.88 | 3.299 |
so to speak if you were making | 4,402.739 | 3.301 |
assumptions like the first column's | 4,404.179 | 3.181 |
always going to be named the second | 4,406.04 | 3.24 |
column's always going to be house things | 4,407.36 | 3.9 |
will break fast if those assumptions | 4,409.28 | 3.3 |
break down | 4,411.26 | 3.479 |
so not a problem in this case | 4,412.58 | 4.56 |
well let me propose that besides reading | 4,414.739 | 4.44 |
csvs let's at least take a peek at how | 4,417.14 | 4.5 |
we might write a csv2 if you're writing | 4,419.179 | 4.381 |
a program in which you want to store not | 4,421.64 | 3.539 |
just students names but maybe their | 4,423.56 | 3.9 |
homes as well in a file how can we keep | 4,425.179 | 4.621 |
adding to this file let me go ahead and | 4,427.46 | 5.279 |
delete the contents of students.csv and | 4,429.8 | 5.399 |
just re-add a single simple row name | 4,432.739 | 5.821 |
comma home so as to anticipate inserting | 4,435.199 | 5.581 |
more names and homes into this file and | 4,438.56 | 4.38 |
then let me go to students.pi and let me | 4,440.78 | 4.379 |
just start fresh so as to write out data | 4,442.94 | 3.36 |
this time I'm still going to go ahead | 4,445.159 | 3.781 |
and import CSV I'm going to go ahead now | 4,446.3 | 5.52 |
and prompt the user for their name so | 4,448.94 | 5.34 |
input quote unquote what's your name | 4,451.82 | 4.56 |
question mark and I'm going to go ahead | 4,454.28 | 4.32 |
and prompt the user for their home so | 4,456.38 | 5.04 |
home equals input quote unquote where's | 4,458.6 | 6.18 |
your home question mark now I'm going to | 4,461.42 | 5.16 |
go ahead and open the file but this time | 4,464.78 | 3.72 |
for writing instead of reading as | 4,466.58 | 5.119 |
follows with open quote unquote | 4,468.5 | 5.94 |
students.csv I'm going to open in append | 4,471.699 | 4.841 |
mode so that I keep adding more and more | 4,474.44 | 4.14 |
students and homes to the file rather | 4,476.54 | 3.72 |
than just overwriting the entire file | 4,478.58 | 3.3 |
itself and I'm going to use a variable | 4,480.26 | 4.14 |
name of file I'm then going to go ahead | 4,481.88 | 4.44 |
and give myself a variable called writer | 4,484.4 | 3.6 |
and I'm going to set it equal to the | 4,486.32 | 3.78 |
return value of another function in the | 4,488 | 5.34 |
CSV module called CSV dot writer and | 4,490.1 | 6.42 |
that writer function takes as its sole | 4,493.34 | 7.02 |
argument the file variable there now I'm | 4,496.52 | 5.1 |
going to go ahead and just do this I'm | 4,500.36 | 3.78 |
going to say writer dot right row and | 4,501.62 | 4.98 |
I'm going to pass into right Row the | 4,504.14 | 4.8 |
line that I want to write to the file | 4,506.6 | 4.32 |
specifically as a list so I'm going to | 4,508.94 | 4.86 |
give this a list of name comma home | 4,510.92 | 4.2 |
which of course are the contents of | 4,513.8 | 3.06 |
those variables now I'm going to go | 4,515.12 | 3.539 |
ahead and save the file I'm going to go | 4,516.86 | 4.319 |
ahead and rerun python of students.pi | 4,518.659 | 4.921 |
hit enter and what's your name well let | 4,521.179 | 4.441 |
me go ahead and type in Harry as my name | 4,523.58 | 5.159 |
and number four | 4,525.62 | 7.14 |
comma privet Drive enter now notice that | 4,528.739 | 6.661 |
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