String$-$based Log Analyzer

Task: Write a function log$\_$analyzer$($log$\_$string$)$ that analyzes a given string representing log data. The function should count the number of error

messages and return this count. An error message is identified by the keyword "ERROR" at the beginning of a line. The log data will be provided

as a single string where lines are separated by newline characters $($In$).$

def log$\_$analyzer$($log$\_$string$)$:

# your implementation here

pass

# # Student Test Cases

# log$\_$sample$\_1=$ "INF$0$: User logged in

ERROR: Invalid password

INF$0$: Security alert

ERROR: System overload"

# log$\_$sample$\_2=$ "INF$0$: Data updated

ERROR: Connection failed"

# log$\_$sample$\_3=$ "WARNING: Low disk space

INF$0$: File saved"

# assert log$\_$analyzer$($log$\_$sample$\_1)==2$

# assert log$\_$analyzer$($log$\_$sample$\_2)==1$

# assert log$\_$analyzer$($log$\_$sample$\_3)==0$

$*$ For each of the functions below, at least two examples are provided to test your functions.

functions will be tested both with examples provided in each question and with extra examples.

Each function has to be documented with docstrings $.$ In particular, each function has to have docstrings that specify: a$.$ description about what the function does $($while mentioning parameter names$)$ b$.$ preconditions, if any