# Collaboratory Notes for Programming
## 2/15
- floating point number, string, literal, variable,
- associative array / dictionary / hash,
**Keywords**:
- concatenation
- operands
- operator (+,*,etc)
- overloaded operator
- assignment ('='), (storing the result to the left side of the operands)
- type casting (str, int, etc..)
- empty string (example: a = '')
- comments (#)(''')
- newline character (\n)
**Resources**:
- python3 replit: https://replit.com/languages/python3
- hexadecimal numbers: https://www.techtarget.com/whatis/definition/hexadecimal
- w3schools python: https://www.w3schools.com/python/
- Python cheat sheet:https://www.pythoncheatsheet.org/cheatsheet/basics
## 2/22
**Keywords**:
- literals
- bitwise operators (&, |)
1. & operator means AND
2. | operator means OR
- shell (bash, tcsh, ksh, zsh) (ctrl+d to exit)
<b><i><u>Putty Login</b></u></i>
hostname: v.im.cyut.edu.tw
port: 22 => 2203
<i><b><u>HOMEWORK</b></u></i>:
Upload a picture to home directory under public_html
## 3/01
**Keywords**
- comparison operator (>, <)
- logical operator (e.g. "and" "or")
- logical expression (something that evaluates to True or False)
- indentation
- nested statement
- half-closed, half-open interval example: [5,7)
- iteration
- function definition
- function invocation
- formal parameter/argument
- actual parameter/argument
- positional parameter/argument
- optional parameter/argument (e.g. end='' in print statement)
- default value (for optional parameter/argument)
- format integer
- nested list: A list with lists within it.
-
**Code**
```python
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('N', help='up to which integer', type=int)
parser.add_argument('K', help='raised to which power', type=int)
args = parser.parse_args()
def sum_of_powers(n, k):
s = 0
for i in range(1, n+1):
x = 1
for j in range(k)
x *= i
s += x
return s
# x = int(input('N: '))
# y = int(input('K: '))
x = args.N
y = args.K
print('N: ' + str(x))
print('K: ' + str(y))
print('sum of powers of K up to N: ')
print(sum_of_powers(x, y))
```
aboba
## 3/08
**Keywords**
## 3/22
**Keywords**
- nested list
- iterate over (some list)
- list comprehension
- array slice
## 4/12
**Keywords**
- ansi escape sequences
## 4/19
**Keywords**
- dictionary
- hash (in some other languages)
- associative array (in some other languages)
- output redirection
**Homework**
- change the number which is a string into a floating number before putting it into a dictionary
# 4/26
- variable['key'] = value # adding key value to a variable
- del variable['key'] # for deleting key value
- {mm:fcu[mm][::-1] for mm in fcu }
# 5/10
## UMap Links:
- [bike api](https://tdx.transportdata.tw/api-service/swagger/basic/2cc9b888-a592-496f-99de-9ab35b7fb70d#/Bike/BikeApi_Station_2180)
- [206 Jav](https://umap.openstreetmap.fr/en/map/untitled-map_912224)
- [222 Myk](https://umap.openstreetmap.fr/en/map/untitled-map_912223#19/24.06827/120.69976)
- [221 Bil](https://umap.openstreetmap.fr/en/map/untitled-map_912221#16/24.0670/120.6975) Chaoyang second Dormitory
- [207 said](https://umap.openstreetmap.fr/en/map/untitled-map_912217)
- [228 mawar](https://umap.openstreetmap.fr/en/map/new/#19/24.06846/-599.28399)
- [226 Annisa](https://umap.openstreetmap.fr/en/map/untitled-map_912228)
- [227 bagas](https://umap.openstreetmap.fr/en/map/untitled-map_912235)
- [018 Leon](https://umap.openstreetmap.fr/en/map/untitled-map_912231)
- [214 kart](https://umap.openstreetmap.fr/id/map/untitled-map_912225)
- [087 Iris](https://umap.openstreetmap.fr/zh/map/iris-map_912233#13/24.1541/120.6967)
- [ibra](https://umap.openstreetmap.fr/en/map/untitled-map_912215)
- [219 Bema](https://umap.openstreetmap.fr/en/map/untitled-map_912241)
# 5/10
# Regular Expressions
- \d = [0-9] = [0123456789]
- {3} = repeat for 3 times - u put number like [4] in the front i.e: [5]{3} which will repeat 5 three times.
- . is everything
- \. is i'm only looking for dot
- \d{1,3} is atleast repeated once or twice or atleast three times.
- (\d{1,3}\.){3}\d{1,3} is for finding numbers that look like an IP adress.
- *? don't go further
- $1 pattern must occur at the end of a line
- ^ except
- \s = [*space*\t\n]
# Who is who
- Chao-Kuei Hung: Greg