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Update README.md

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Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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python_basics/list/README.md
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@ -142,7 +142,7 @@ print(sum(primes)) # -> 17
print(max(primes)) # -> 7
```
### [append()](), [pop()](), and [remove()]()
### [append()](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists), [pop()](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists), and [remove()](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists)
```python
collection_of_strings = [
@ -165,7 +165,47 @@ print(collection_of_strings.pop()) # -> II
print(
collection_of_strings
) # -> ['AA', 'BB', 'BB', 'CC', 'DD', 'EE', 'FF', 'GG', 'HH']
collection_of_strings.remove("BB")
print(collection_of_strings) # -> ['AA', 'BB', 'CC', 'DD', 'EE', 'FF', 'GG', 'HH']
collection_of_strings.remove("BB")
print(collection_of_strings) # -> ['AA', 'BB', 'CC', 'DD', 'EE', 'FF', 'GG', 'HH']
collection_of_strings.remove("BB")
print(collection_of_strings) # -> ValueError: list.remove(x): x not in list
```
## [Index](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists)
```python
collection_of_strings = [
"AA",
"BB",
"CC",
"DD",
"EE",
"FF",
"GG",
"HH",
]
print(collection_of_strings.index("CC")) # -> 2
print(collection_of_strings.index("XX")) # -> ValueError: 'XX' is not in list
```
## [del](https://docs.python.org/3/tutorial/datastructures.html#the-del-statement) and [insert](https://docs.python.org/3/tutorial/datastructures.html#more-on-lists)
```python
collection_of_strings = []
collection_of_strings.append("BB")
collection_of_strings.append("CC")
collection_of_strings.append("DD")
print(collection_of_strings) # -> ['BB', 'CC', 'DD']
collection_of_strings.insert(0, "AA")
print(collection_of_strings) # -> ['AA', 'BB', 'CC', 'DD']
del collection_of_strings[1]
print(collection_of_strings) # -> ['AA', 'CC', 'DD']
```