我想让用户输入一个名字，这个名字在row 3的字典里，程序将在row 3的字典里查找这个单词，并计算这个单词在单独一行中出现的次数。
我还想程序找到所有的邮政编码这种类型的树是在和城市，有最大数量的这种类型的树。

输入命令：白色栎树
入口：白色橡木

Total number of such trees: 642
Zip codes in which this tree is found: 10011,11103,11375,10002,10463
Borough containing the largest number of such trees: Bronx, with 432

这是我到目前为止所拥有的，它要求我输入树名，但没有发生任何事情，然后它循环要求我再次输入树名。

import csv
from collections import Counter
# variables
# Load data into string variable
# file is variable called data
with open('nyc_street_trees.csv','r') as my_file:
     data = my_file.read()

# Create a list of each row
rows = data.split("\n")

# Create a dictionary
tree_type = {}

# Iterate through each row, this prints out each row on a separate line
for row in rows:
    # Split the row into info
    info = row.split(",")

    # Check if the row is the proper length
    if len(info) == 9:
        # separate out the data
        tree_id = info[0]
        tree_dbh = info[1]
        health = info[2]
        spc_common = info[3]
        zipcode = info[4]
        boroname = info[5]
        nta_name = info[6]
        latitude = info[7]
        longitude = info[8]

        # Populate the dictionary
        tree_type[spc_common] = info[3]

        userinput = input('Enter tree species:')

count = 0
for key in tree_type:
    if tree_type[spc_common] == 'userinput':
        count += 1

print(count)

#print(tree_type)
        # prints out the row with tree names
       # print(f'Spc: {spc_common} ')
#print(data)
#print(rows)
  # print(row)
#print(type(rows))
  # print(type(info), info)

运行程序时我看到的内容：

Enter tree species:mulberry
Enter tree species:

我还是个初学者，所以也许有人能发现我做错了什么。
我想换

with open('nyc_street_trees.csv','r') as my_file:
     data = my_file.read()

与

inputFile = open("data.txt", "r")

我试过了

count = 0
for key in tree_type:
    if tree_type[spc_common] == 'data':
        count += 1