Python 名称错误：：名称'；pytesseract'；没有定义

刚刚加入，我想知道是否有人能解释一下我的问题。我不熟悉机器学习代码和Python光学字符识别，因此有一些问题。我现在想用Pytesseract来阅读带有等距图的PDF，我这周才开始这个项目。所以，像手写、测量等，我将按照本教程从pytesseract开始。对于IDE，我正在使用GoogleColab。这是我的代码和我得到的错误。请原谅任何不好的做法，我已经有一段时间没有编码了

# Install Packages
!pip install pytesseract
!pip install pdfplumber
!pip install Pillow

# Imports 
#import pytesseract
import pdfplumber
from google.colab import drive

# Mount Drive
drive.mount('/content/gdrive', force_remount=True)

# Functions
def pdf_reader():
  with pdfplumber.open(r'/content/gdrive/My Drive/Colab Notebooks/iso1_1.pdf') as pdf:
    iso1 = pdf.pages[0]
    print(iso1.extract_text())
  with pdfplumber.open(r'/content/gdrive/My Drive/Colab Notebooks/iso2_2.pdf') as pdf:
    iso2 = pdf.pages[0]
    print(iso2.extract_text())
  with pdfplumber.open(r'/content/gdrive/My Drive/Colab Notebooks/iso3_3.pdf') as pdf:
    iso3 = pdf.pages[0]
    print(iso3.extract_text())
  with pdfplumber.open(r'/content/gdrive/My Drive/Colab Notebooks/iso4_4.pdf') as pdf:
    iso4 = pdf.pages[0]
    print(iso4.extract_text())
  with pdfplumber.open(r'/content/gdrive/My Drive/Colab Notebooks/iso5_5.pdf') as pdf:
    iso5 = pdf.pages[0]
    print(iso5.extract_text())

# OCR Function
try:
  from PIL import Image
except ImportError:
  import pytesseract

def ocr_process(filename1):
  text1 = pytesseract.image_to_string(Image.open(filename1))
  return text1


print(ocr_process('/content/gdrive/My Drive/Colab Notebooks/iso1_1.pdf'))

pdf_reader()

我得到的错误是：

Requirement already satisfied: pytesseract in /usr/local/lib/python3.6/dist-packages (0.3.6)
Requirement already satisfied: Pillow in /usr/local/lib/python3.6/dist-packages (from pytesseract) (7.0.0)
Requirement already satisfied: pdfplumber in /usr/local/lib/python3.6/dist-packages (0.5.23)
Requirement already satisfied: Pillow>=7.0.0 in /usr/local/lib/python3.6/dist-packages (from pdfplumber) (7.0.0)
Requirement already satisfied: Wand in /usr/local/lib/python3.6/dist-packages (from pdfplumber) (0.6.3)
Requirement already satisfied: pdfminer.six==20200517 in /usr/local/lib/python3.6/dist-packages (from pdfplumber) (20200517)
Requirement already satisfied: pycryptodome in /usr/local/lib/python3.6/dist-packages (from pdfminer.six==20200517->pdfplumber) (3.9.8)
Requirement already satisfied: chardet; python_version > "3.0" in /usr/local/lib/python3.6/dist-packages (from pdfminer.six==20200517->pdfplumber) (3.0.4)
Requirement already satisfied: sortedcontainers in /usr/local/lib/python3.6/dist-packages (from pdfminer.six==20200517->pdfplumber) (2.2.2)
Requirement already satisfied: Pillow in /usr/local/lib/python3.6/dist-packages (7.0.0)
Mounted at /content/gdrive
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-10-8559cf424168> in <module>()
     48 
     49 
---> 50 print(ocr_process('/content/gdrive/My Drive/Colab Notebooks/iso1_1.pdf'))
     51 
     52 pdf_reader()

<ipython-input-10-8559cf424168> in ocr_process(filename1)
     44 
     45 def ocr_process(filename1):
---> 46   text1 = pytesseract.image_to_string(Image.open(filename1))
     47   return text1
     48 

NameError: name 'pytesseract' is not defined

已满足要求：pytesseract位于/usr/local/lib/python3.6/dist-packages（0.3.6）中
已满足要求：枕在/usr/local/lib/python3.6/dist-packages中（来自pytesseract）（7.0.0）
已经满足的要求：PDFP/usr/local/lib/python3.6/dist-packages（0.5.23）中的木材
已满足要求：枕头>=7.0.0 in/usr/local/lib/python3.6/dist-packages（来自pdfplumber）（7.0.0）
已满足要求：魔杖in/usr/local/lib/python3.6/dist-packages（来自pdfplumber）（0.6.3）
已满足要求：pdfminer.six==20200517 in/usr/local/lib/python3.6/dist-packages（来自pdfplumber）（20200517）
已满足要求：pycryptodome in/usr/local/lib/python3.6/dist-packages（来自pdfminer.six==20200517->pdfplumber）（3.9.8）
已满足的要求：chardet；python_version>/usr/local/lib/python3.6/dist-packages中的“3.0”（来自pdfminer.six==20200517->pdfplumber）（3.0.4）
已满足要求：在/usr/local/lib/python3.6/dist-packages中分类容器（来自pdfminer.six==20200517->pdfplumber）（2.2.2）
已满足要求：枕在/usr/local/lib/python3.6/dist-packages（7.0.0）中
安装在/content/gdrive
---------------------------------------------------------------------------
NameError回溯（最近一次呼叫上次）
在（）
48
49
--->50打印（ocr_过程（'/content/gdrive/My Drive/Colab Notebooks/iso1_1.pdf'））
51
52 pdf_阅读器（）
在ocr_过程中（文件名1）
44
45 def ocr_流程（文件名1）：
--->46 text1=pytesseract.image_to_字符串（image.open（filename1））
47返回文本1
48
NameError:未定义名称“pytesseract”

除了这里的这个线程之外，我已经尝试过了，但是没有发现太多，但是我尝试过根据这个线程来更改它，但是得到了相同的错误，除了

image\u到
string not defined

提前感谢。
ocr\u过程
正在尝试使用
pytesseract
，无论它是否通过您的
导入，请尝试除上面的
之外。只有在知道已导入库的情况下，才应使用该库。只有在没有PIL库的情况下，它才会起作用，因为
pytesseract
import显然从未发生过，所以它看起来确实有PIL库

另外，由于您也使用了PIL的
图像
，因此在您的示例中，您必须同时导入这两个库